Select the one animal that has all of the roundworm traits listed above.
Birdwing butterflies have an exoskeleton and six legs. Males are bright green and black, and females are brown or yellow. Both males and females have one pair of antennae. Trichina worms have soft, thin bodies. They have a cylindrical shape and do not have limbs. Trichina worms are not made up of segments. They can infect and feed off of humans, pigs, and other mammals.
Roundworms are a group of animals with similar traits. The following traits can be used to identify roundworms:
have a soft, cylindrical body
have no limbs
are not made up of segments Observe the animals and read the descriptions.
Scientists sort animals with similar traits into groups. This is called classification. Classification helps scientists learn about how animals live.
How do scientists classify animals? First, they make observations about an animal. Scientists observe the animal's traits, including its body parts and behavior. Then, scientists compare the animal's traits to other animals' traits. Scientists classify animals with similar traits into a group.
To decide if an animal is part of a group, look at the traits of the group.
Roundworms have the following traits:
Compare each animal's traits to the group's traits. Select the animal with traits similar to the group's traits.
A trichina worm has the following traits:
A trichina worm has the traits of a roundworm. A trichina worm is a roundworm.
A birdwing butterfly has the following traits:
It has six legs.
It has an exoskeleton.
It has one pair of antennae.
A birdwing butterfly does not have all of the traits of a roundworm. A birdwing butterfly is an insect.