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Cells and organisms | Are all bacterias unicellular or just some? | Most bacteria are unicellular. Some species of bacteria build up colonies in which many individual cells unite. Cells within those colonies can share tasks and even adopt different morphology (the way they look). In several cases it is very difficult to decide whether something is a colony of many cells, or one big multicellular organism. Scientists have been debating about this for long time now.
Learn more about it here:
https://www.jstor.org/stable/24989125
https://onlinelibrary.wiley.com/doi/epdf/10.1002/bies.20740
https://sfamjournals.onlinelibrary.wiley.com/doi/full/10.1111/j.1758-2229.2010.00215.x?casa_token=xG3l6_YtRx8AAAAA%3AV-6My7f896SeXRpQyshvIepvNNsJDnfpaEXcnFADjSpbqJ0B2nikZu-VvfKLXbD131QCjlI_ekm8UU8
https://royalsocietypublishing.org/doi/full/10.1098/rsif.2011.0102 |
Cells and organisms | So I have 2 questions. 1 is last year we learned that atoms are the smallest things but this year we learned that cells are the smallest things so which is it. And number 2 if you have 2 unicellular things and they combine would that make it a multicellular | The cell is the smallest unit of life, and the atom is the smallest unit of a chemical element. Cells are much bigger, and they’re made up of many, many atoms.
Atoms aren’t even the smallest thing, though! They are made of tiny particles including protons, neutrons, and electrons. Protons and neutrons are made of even smaller things called quarks!
Two individual cells can be together to make something multicellular. If you take any two random cells, though, they won’t necessarily make a multicellular organism. |
Cells and organisms | How long do cells live? And if they do not live very long how are we alive? And if it is because they multiply, how do we die? | Cells in your body are constantly dying, but also constantly reproducing, so you live a much longer life than your cells. We die not when our cells die, but when they stop preforming the functions they are supposed to. |
Cells and organisms | is a cell smaller than a atom or Atoms the smallest thing ever | Cells are made up of many, many, many atoms, so they are definitely bigger than atoms.
Atoms are very small (brooklyn.cuny.edu says “ a row of 10^8 (or 100,000,000) atoms would stretch a centimeter, about the size of your fingernail. ”). However, there are things even smaller than atoms! Atoms are actually made up of some combination of protons, neutrons, and electrons. The protons and neutrons make up the nucleus at the center. Just for scale, if the whole atom were the size of an American football stadium, the nucleus would be the size of a golf ball inside of it!
I hope this helps! |
Cells and organisms | Are eggs single cells? | Yes, eggs, in a biological sense, are indeed single cells. Eggs in the common term (like chicken eggs) are basically containers that hold that cell (the yolk). |
Cells and organisms | What is that how small the cell? | i thought you were me for a second |
Cells and organisms | what are cell divisions | Cell divisions may sound like different groups, but it is a process of a cell splitting into two to make more cells |
Cells and organisms | What is that red blood cell | this is a cell, which has protein called hemoglobin, that transports oxygen the lungs to the rest of the body.
imagine this, the hemoglobin is a car that transports the oxygen to and from somewhere, just like a taxi. then it drops the the oxygen off to its destination for example different types of organs. |
Cells and organisms | what is made out of 1 cell? | some things that are teenie tiny like micro stuffs (i mean like the tiny bacteria in the ocean kind of stuffs) |
Cells and organisms | If we got cells and our parents got cells and our grandparents got cells and our ancestors got cells where did the first cell come from? | a smarter and shorter way to say it is:How did the first cell originate?
anyway to answer you qwestion,
Enclosure of self-replicating RNA in a phospholipid membrane. The first cell is thought to have arisen by the enclosure of self-replicating RNA and associated molecules in a membrane composed of phospholipids.
i hoped this helped. |
Sensory processing and the brain | why do we need to blink? | It helps your eyes stay moist, and keeps some grime out of them. |
Sensory processing and the brain | so what about the people that cant feel pain how does that work can they just not feel anything or is it just like a wired sensation or something and why do we feel pain what sense is that because it didn't explain that in the video? | Pain is its own sense. The human body has pain receptors all over. Pain receptors send a signal to the brain through the neurons that tell the brain something is wrong. That message is what we perceive as pain. Some individuals have a different genetic trait that results in a different sensation of pain: it simply doesn't hurt. They feel something, but not the unpleasantries that everyone else feels. |
Sensory processing and the brain | so what happend to the blind poeple?
not being rude or anything | they became bilnd |
Sensory processing and the brain | If your skin got ripped off would the nervous cells there die? Would you still feel pain if you pinch the scar left after? Or would the nervous system heal itself after?! | If your skin were to be ripped off, the cells there would not die, but no, pinching the scar would not hurt just because you have been wounded there before. Your body would heal itself over time.
( but you should definitely go to the hospital to get some medical attention if this were to happen ) |
Sensory processing and the brain | What happens if we don’t blink? Do we die? | I don’t think it’s possible to not blink. When we blink, our eyelids protect us from dust and other things. Our eyes are also moistened by our tear glands each time we blink. That’s why staring contests are so hard! This is also why we blink when something unexpected comes toward our face.
However, because snakes and fish don’t have eyelids, they can’t blink at all! So, never try to have a staring contest with a fish.😉
But to answer your question, no, I don’t think you would die if you never blinked, just that your eyes would get really irritated, and maybe even get damaged. But speaking seriously, I don’t think you could even keep your eyes open for that long!
Hope that helped! |
Sensory processing and the brain | will i die if my lungs stop working? | Yes,without being able to breath it's impossible to survive. |
Sensory processing and the brain | if someone is donating a kidney will they have to cut open their stomatch?
is it possible to donate a brain? | When someone donates a kidney, the process typically involves a surgical procedure called a nephrectomy. However, the surgeon does not need to cut open the stomach. Instead, they make small incisions in the side or abdomen to remove the kidney. This is known as laparoscopic surgery, which is minimally invasive and offers several benefits such as quicker recovery and minimal scarring.
As for donating a brain, currently, it is not possible to donate a brain while the donor is alive. The brain is a highly complex and vital organ that cannot be transplanted from one person to another. Brain activity and consciousness are intricately linked, making it challenging to transfer such functions between individuals. At present, brain donation for scientific research purposes typically occurs after a person's passing to study specific conditions or diseases. |
Sensory processing and the brain | Why is stimuli related to sight called electromagnetic stimuli?? | What is the stimulus for the sense of sight?
Image result for Why is stimuli related to sight called electromagnetic stimuli??
Visual (seeing) Sight is processed through the 'Visual' sense. Visual stimuli is picked up by visual receptors located in the eye. Visual receptors are stimulated by light, colour and movement. I hope this answers your question. |
Cell parts and functions | has there ever been anything that had both animal and plant cells? | From what i searched i didn't see any organism that does but there is something called
Euglena and it is found in brackish water habitats. |
Cell parts and functions | vote if you love your mom | my mom is ded |
Cell parts and functions | Hey quick question,
Do humans need mitochondria to survive or will they be okay without them? | Yes, humans (and all organisms with mitochondria) need them to survive. They break down sugars, giving our cells the energy they need to function. |
Cell parts and functions | Am I the only one here from 2023? | No 2023 here as well. |
Cell parts and functions | When we cook vegetables sometimes they become floppy or mushy, does that mean that the cell wall is being broken down? | Great question, from logic and what I looked up, yes! It is breaking the cell walls. It makes it easier to eat and digest. |
Cell parts and functions | What are the differences between an animal cell and a plant cell? I know the differences between them, they are mitochondrion(animal cells) and chloroplast(plant cells). But what else? | Actually, you are partially wrong. Plant cells do indeed have chloroplasts while animal cells do not, but both types of cells have mitochondria.
Animal cells have structures called lysosomes (which are basically organelles containing an extremely acidic fluid to break down objects) and centrosomes (used in cell reproduction). Plant cells have neither of these.
Plant cells have cell walls that surround their cell membrane, and large central vacuoles that make the cell rigid. Animal cells have neither of these structures.
Additionally, animal cells usually have an irregular shape, while plant cells are more rectangular.
Does that answer your question? |
Cell parts and functions | How does the mitochondria and the chloroplast work together | The chloroplast creates food for plants (sugars), and the mitochondria breaks them down for energy. |
Cell parts and functions | I have 2 questions!
1: When we cook vegetables sometimes they become floppy or mushy, does that mean that the cell wall is being broken down?
2: Has there ever been a mutation where a animal cell contains something that only a plant cell has or vice versa? | It's probably being melted because of the heat for question 1 |
Cell parts and functions | i dont have a phone :( | me neither:( |
Cell parts and functions | In which organelle does photosynthesis occur? | The Chloroplast. |
Organization in the human body | Is an orange called an orange because the inside of an orange is orange or is an orage called an orange because the outside of an orange is orange?? | the name of the fruit orange is older than the name of the color orange. orange was called "yellow-red" back then. Then they changed the name to orange because oranges were orange. |
Organization in the human body | can you sneeze into your organ? | i dont know |
Organization in the human body | can foods cause our organs to fail? | Yes certain foods are not good for are organs if you eat to much of those certain food it can result in organ failure. |
Organization in the human body | hi i think math is fun. Am i right? | Imma have to disagree |
Organization in the human body | what happens if the tissues dont have cells anymore? | if tissues are made of cells if tissues don't have cells they simply just wont be tissues |
Organization in the human body | What happens when you have a heart attack? I know somewhat, your arteries get clogged and then your heart can't beat normally right? | During a heart attack, your arteries get clogged which can cause a lack of blood flow that causes the tissue in the heart muscle to die which can cause your heartbeat to slow down, and this can lead to death. Hope this helps! |
Organization in the human body | how many orgns are in the human body | Altogether there are seventy-eight main organs within the human body. These organs work in coordination to give rise to several organ systems. Among these 78 organs, five organs are considered vital for survival. These include the heart, brain, kidneys, liver and lungs. |
Organization in the human body | if there are many tissue cells, can you count them all? | No because:
1: Everyone has a different amount.
2: The amount constantly changes as cells die and are created again.
3: There are so many that it would take forever to count them. |
Organization in the human body | So, if the organ is made of tissues. Human cells are tissues too? | Actually, this is incorrect. If you go back and read the article, you will find that human cells are the smallest "unit", so to speak, of the organization of the human body. Tissues are made up of many cells. So human cells are not tissues; rather, tissues are groups of specialized human cells |
Sexual and asexual reproduction | Why does one parent make the offspring identical? | If there is only one parent contributing genes, all of the genes from that parent are passed on, making the offspring genetically identical. If there are two parents, then half of the genes from one parent are contributed, and half the genes from the other parent. They mix and make offspring that aren't identical to either parent. |
Sexual and asexual reproduction | This sounds like a lame question, but if one type of bacteria always asexually produces, then would the genes of the very first kind of bacteria be the exact same as the newest bacteria just produced? Will there ever be a mistake in the genes or an addition of genes based on evolution and adaptation? | Well, bacteria are simple and therefore often lack mutation prevention systems that more complicated organisms have. They also reproduce a lot. Making mistakes are very rare, but they definitely do happen [Referense: today's biodiversity]. *Today's bactera are very different from the first bacteriums* because they've gone through _trillions_ of reproductions (assuming 1 thousand reproductions happen a year). And no, it's not a lame question. |
Sexual and asexual reproduction | If two parents make another and each give the offspring 1/2 of their DNA, why do some offspring look or act way more like one parent? | As for the appearance I am not sure, but behaviour is mostly based off of which parent influenced the child more after birth. |
Sexual and asexual reproduction | What are the advantages and disadvantages of asexual and sexual? | some advantages of a sexual, and asexual beings is that they both create life on earth, and somewhat do the same job! |
Sexual and asexual reproduction | ```How does parents make twins and does that happen with cells?``` | Twins happen when 2 egg cells get fertilized at the same time. Identical twins happen when a fertilized egg cell split into two. |
Sexual and asexual reproduction | What if a female dog and another female dog made out, would that make a puppy? | You need a male and a female to reproduce. |
Sexual and asexual reproduction | What came first the chicken or the egg?? | The egg, because the first chicken was probably mutant. |
Sexual and asexual reproduction | So if parents give a birth to twins or triplets, does it mean that the children have each of their personality, looking, and stuff from the parents? | First, let’s make it clear that there are two kinds of twins/triplets: fraternal and identical. Fraternal twins happen when two eggs come out of the fallopian tubes, and both eggs are fertilized by the sperm. This means that two babies will grow inside their mother’s uterus, and the babies will not be the same.
However, identical twins happen when only one egg comes out of the fallopian tubes. After the egg is fertilized, it starts growing. An egg grows when it multiplies. This means that the egg splits into two parts, and each of those parts split into two parts, and so on. But since the egg splits so fast, sometimes it makes mistakes. Identical twins happen when the egg splits so quickly that it becomes two separate pieces, and then each of those pieces becomes its own baby. The egg comes from the mother and has her genes, and the sperm comes from the father and has his genes. Eggs are always female, or X. The sperm can be either X or Y, male. If an X sperm meets an egg, you get a baby girl. If a Y sperm meets an egg, you get a boy. But if you’re asking if twins are clones of their parents, then the answer is no.
Hope that helps! |
Organism growth and the environment | Does a yellow dandilion turn into the white fluff version? Also if a dandilion grows some place that doesnt have a lot going on how do their seeds desperse? Do they just fall off? or do the seeds stay on until the plant dies? | It depends what you mean, by nothing going on,if you mean no wind or animal dispersal, it wound most likely fall to the ground. |
Organism growth and the environment | one time my dog ate a firefly and then she started foaming at the mouth... she was fine after a drink of water tho. Spicy bug? | Also maybe because of the chemicals inside the firefly, as t=it uses those to create bioluminescence. |
Organism growth and the environment | Does the average organism dwell better in hot or cold environments? | Depends on its adaptations, but on average, I would say lean towards the hotter side as the air is more humid and since there tends to be more biodiversity in places like Costa Rica. |
Organism growth and the environment | What if we interbred two species? Will the two different species provide their separate reproductive cells and fuse them into the offspring? Or is it something completely different? | If you interbred a species,the offspring would have half of both of the parents genes.Search up interbred species images, and it will show you what happens when you interbreed any species. |
Organism growth and the environment | I watched the video and I got really sad because my dog is really hurting right now and I feel really bad for him because he has been my best friend since the day that my dad brought him home. Anyways no more about me do you guys have any dogs? | used to have the cutest hound mix puppy ever. dont have him anymore, couldnt buy his food anymore. he was so cute. i loved Buddy |
Organism growth and the environment | what is the breed of the little dog?
-Elsie | Chihuaha |
Organism growth and the environment | why are the dogs in the picture chained to each other? | They aren't. The great Dane's leash is touching the ground, not attached to the chihuahua. |
Animal behavior and offspring success | I went to a zoo once and a male peacock was showing off its feathers to a female peacock and the male peacock got rejected. | emotional damage |
Animal behavior and offspring success | Did you know?
Insects are more likely to asexually reproduce than animals?
FACTS. | Yes, some insects do reproduce asexually, but remember that insects are a type of animal, too! |
Animal behavior and offspring success | Do male birds always attract female birds like this or is there some other way? | Not always.
When it comes to birds, the male usually attracts the female. This can be done through attractive looks, flying, fighting, and, of course, offerings. |
Animal behavior and offspring success | how on earth does asexual reproduction work? is it for the organisms that don't require a mate to produce offspring? | Yes, they don't require a mate, but it's kinda like cell division, to be honest. |
Animal behavior and offspring success | Some behaviors increase the chance of producing offspring. These include displays that attract mates. | Correct. |
Animal behavior and offspring success | Why don't all species reproduce asexually? If they did, wouldn't it drive reproductive success? I'm asking this because if every animal reproduce asexually they wouldn't need to mate which would waste less time and energy. | Sexual reproduction actually contributes genetic diversity to populations. When the different animals have different traits, it’s more likely that some of them will have traits that let them survive in changing environments. |
Animal behavior and offspring success | will there ever be a bird that can make a offpring by asexual | no. all birds have to have sex with a mate to make offspring |
Animal behavior and offspring success | I live on a farm, and I keep getting chased and KICKED by the rooster. Not only that but he chases the hens and tries get on their backs to mate with them. One of our hens hates it, and she runs away from him but sometimes gets caught. I hate that rooster. He hurts me ALL THE TIME by kicking me and chasing me around. 😭😭 | Btw I have chickens too. And you just have to act calm around the rooster. also its normal for him to just want to mate 1 hen. though it crazy |
Animal behavior and offspring success | does everything do offspring? | yes! every organism produces offspring in one way or another |
Animal behavior and offspring success | can someone explain to me in the easiest way on what offspring reproduction means? | The more babies (that actually survive birth and childhood),the higher the reproductive success. |
Plant reproductive success | I'm so glad I'm contributing to nature, by blowing my share of dandelions in exchange for the small small price of a wish:) | Actually, I have something else to say too. Dandelions actually spread it's children;) across the world using the wind. But since humans like blowing them so much, I predict that dandelions will start growing up near cities where more people live! Tell me if you see dandelions growing in a corner of your park!:-)))) |
Plant reproductive success | Bee's are cute, Who agrees? | There are people who agree or disagree with your question. |
Plant reproductive success | be serious does anyone like Khan Academy? | yea its easy I'm not mad |
Plant reproductive success | what happens if theres no more bees? | A drastic effect on the amount of pollinators likely causing a mass extinction. (That is if they die off very quickly). |
Plant reproductive success | I don't understand this part. May I please receive an explanation for this part? | Plants reproduce by pollinators and by seed despersal which means that bees,bats,and other pollinators carry pollen from plant to plant, this causes plants to create offspring (or plant children) then they do seed despersal which is where the plants seeds get sent far away. Normally the seeds get blown far away, the seeds are carried by birds, and even humans can cause seed despersal. Does this explanation help? |
Plant reproductive success | can insects help with pollination or seed dispersal | Bees, wasps, butterflies, beetles, flies and moths can be pollinators. These aren't insects, but hummingbirds and bats can pollinate too. Pretty much any living creature that eats fruits with seeds in them can do seed dispersal as long as the seeds can survive going through their digestive system. |
Plant reproductive success | What happens when one of the animals traveling the pollan get killed by another animal. | Then the pollen would not get to a plant, making the pollen useless (unless some other thing carried the pollen to the plant after it fell) |
Plant reproductive success | What type of bee is that | that is timmy from south park |
Activity: how can measuring cellular respiration help us reach a fitness goal? | Is the person really climbing the stairs for exercise, or literally just to get into their house? | The person is probably doing neither and just posing for the camera |
Activity: how can measuring cellular respiration help us reach a fitness goal? | why is the biology/science khan academy comment section not professional compared to the other subjects LMAO | Because we are goofy goobers. |
Activity: how can measuring cellular respiration help us reach a fitness goal? | if all brains are made and look exactly the same then how do we have differing prefrences and ways of looking at things | Electric in brain go brrrrrrrrrrrrrrrrr |
Activity: how can measuring cellular respiration help us reach a fitness goal? | what would happen if we became our fav animals for a week | when we are human again, we will know what it feels like to be that animal. |
Photosynthesis in organisms | How do plants you buy at the store, stay alive in just water, and no dirt? Also, why are some plants supposed to get direct sun? Thanks! | the plants are already being put in mineral water. It isn't the dirt that helps the plant it is the minerals that help it grow. |
Photosynthesis in organisms | This says, "Photosynthesis is USUALLY carried out in chloroplasts." What are some examples of it being carried out in something else? | i have no idea at all, sure, call me dumb i probably am i think i am, i waste time,and i am a waste |
Photosynthesis in organisms | How the plants survive when they are in shops | These plants get the light they need either through a window or from a lamp that mimics the kind of light coming from the sun. |
Photosynthesis in organisms | what else can plants live in instead of soil | I have an air plant it is a specific kind of tropical plant that lives off of air moisture and a bit of water I give it. It has no roots, although it can develop feelers that allow it to latch onto branches. |
Photosynthesis in organisms | Does a plant need soil to live? | Plants don't require soil to live if you have access to water with the correct nutrients for plants in it. That's why lotuses live in mud/muddy water, it's because mud is full of nutrients that the lotus needs, so the lotus will do better in the muddy water as opposed to just water (without minerals, obviously)! Some plants need soil, however. They may be able to survive a period of time in water with their food, but succulents and cacti need to be transferred to soil after water propagation. Maybe you would find it interesting to research more into this? Anyways, hope this answers your question. Ask more if you need to, there's always somebody on Khan Academy that can help! |
Photosynthesis in organisms | How long can a plant survive without water? | Depends on the plant. For example, some cacti can go two years, but some flowers can't go a week without it. |
Photosynthesis in organisms | Can the plant also survive with out water for one day? | Plants can go to a maximum of a week without water, right? |
Photosynthesis in organisms | how do plants stay alive | The sunlight, water, and carbon dioxide make sugars which the plant consumes to stay alive. |
Photosynthesis in organisms | what is chlorophyll | Chlorophyll is a naturally-produced chemical that helps in the photosynthesis process by, in fact, absorbing the photons (sunlight) used to rearrange atoms, as said in the second point. It also is actually a pigment, giving plants their green color! |
Food and energy in organisms | if a dog eats a cat is the dog a herbivore | Herbivores eats only plants. |
Food and energy in organisms | what do you get when you eat fish? | Usually you get the protein, sugar, and energy from the food. It depends on what you put on the fish. You digest it, and bring all of the good molecules to the cells. |
Food and energy in organisms | what if someone absorbs too many molecules or their stomach digest too much food? | Probably a stomach ache or vomiting. |
Food and energy in organisms | Why is it that when you get older you usually get smaller? | Your body stops working as hard as it did, your intake of food gets slower and slower, so you have less and less molecules entering your body, but you keep expelling them (via going to the bathroom, vomiting, etc) that is also a reason why we pass on at a similar age. |
Food and energy in organisms | So if i am what i eat, would i be 60% Pizza? or just bread, sauce,Cheese, and whatever topping i eat along with it? | Umm no.. that's not what they mean by "you are what you eat" they mean we have the same molecules as the food we eat not the same ingredients. |
Food and energy in organisms | I do not think you should put sugar in bread; why it it classified as a 'sugar' ? | You do put sugar in most breads, and it is a carbohydrate, which is a type of sugar. |
Food and energy in organisms | Will you get sick if you absorb too much molecules? | Yes! When you are finished with thanksgiving dinner, dont you feel stuffed? You feel sick to your stomach and just want to lay down for awhile. If you eat too much food, flavored water, etc, your body will have to do get rid of them somehow, (going to the bathroom or vomiting, in both you start to feel sick) |
Food and energy in organisms | how do they know what the things give off of ? | There are a few ways you can check this:
1) With a microscope XD
2) If you don't have a microscope, you can submerge a plant completely underwater. Soon, you will see bubbles. Those bubbles are oxygen bubbles.
Of course, it is best to do both of these, for it proves both of the outputs. |
Food and energy in organisms | what do sugar proteins and fats do for our body | To put it simply, sugar and fats mainly give us energy. Proteins are also used for the same, but help the development and growth of muscles and hormones too. |
Cellular respiration | I don’t understand how both animal and _plant cells_ release carbon dioxide during cellular respiration? I’m probably confusing it with photosynthesis but how are they different? They seem to serve the same function (i.e.: usable energy to grow and store.) | Photosynthesis uses energy (from the sun) to convert water and carbon dioxide into glucose and oxygen. Then the glucose can be stored for later use. Cellular respiration turns glucose and oxygen into water and carbon dioxide, releasing energy for the organism to use.
Does that help? |
Cellular respiration | isn't respiration basically breathing? | Technically speaking, breathing is the process of ventilating air in and out of your body, while respiration is the mitochondrial task of using the gases you breathe to create energy. Both processes work so closely together that the terms could be used interchangably in a broad sense, but there is a difference between the two. |
Cellular respiration | does anyone else restart exercises whenever you get a question wrong? | I do. |
Cellular respiration | How does your body turn glucose and oxygen into carbon dioxide and water | Chemistry. A chemical reaction occurs inside your mitochondria that results in the rearranging of the atoms in the inputs. |
Cellular respiration | what does glucose mean | its a simple sugar and its your body's main source of energy |
Cellular respiration | i did not understand anything bakaroo | Cellular respiration is a process that happens inside an organism’s cells. This process releases energy that can be used by the organism to live and grow. |
Cellular respiration | What is mitochondria | mitochondria are the organelles that convert sugars and oxygen into carbon dioxide, water, and energy. |
Populations, communities, and ecosystems | Make me get over 50 votes to get an earth badge so then i will get my nintendo switch back plzzzzzzz
*edited :btw i got my switch back and didnt know im famous on this* | Why would they take it away anyway unless you were using it too much? Books are better anyway. Have you read _The Hiding Place_? It's SO good! |
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