Some people have hitchhiker's thumbs, which bend backwards with a large angle between the two segments (phalanges). The myth is that there are just two kinds of thumbs, straight thumbs (S) and hitchhiker's thumbs (H), and the trait is controlled by a single gene with two alleles, with the allele for S being dominant.This was proposed by Glass and Kistler (1953) and has been the subject of very little research since then.he myth is that there are just two kinds of thumbs, straight thumbs (S) and hitchhiker's thumbs (H), and the trait is controlled by a single gene with two alleles, with the allele for S being dominant. This was proposed by Glass and Kistler (1953) and has been the subject of very little research since then.
Two fundamental cellular processes are cellular respiration and photosyn-thesis. Cellular respiration is the process by which cells release stored energy from sugars. Photosynthesis is the process in which producer cells use carbon dioxide, water, and nutrients to produce glucose and oxygen.
Transcript of Why Do Organisms Need Photosynthesis And Cellular Respiratio. Photosynthesis is the process where plants turn water and carbon dioxide into glucose for energy and oxygen is released. They obtain water from their roots and carbon dioxide from the air through these holes in their leaves called the stomata. For example plants, algae and various types of bacteria. Cellular respiration is when an organism takes in oxygen and food (glucose). They need the food for energy and the oxygen to oxidize the glucose, or food. Us as humans lack the required organelles to perform photosynthesis.