Question

1: What do all animals, including vertebrates and invertebrates, have in common?

A. They have backbones, internal skeletons, and muscles.
B. They are heterotrophs that must get their food from plants or other animals.
C. They have lungs or gills for breathing.
D. They are endothermic (warm-blooded).
2: All animals share several common characteristics. Which is a characteristic shared by all animals?
A. endoskeletons and muscles
B. sensory organs and backbones
C. multi-cellular bodies
D. exothermic blood systems
Sam’s teacher asked him to make observations about animals at the zoo. Sam went to the zoo and filled in these two charts that the teacher gave him.
3: What is the main difference between the species in Group 1 and Group 2?
A. Group 1 has small organisms, Group 2 has large organisms.
B. Group 1 are endothermic, Group 2 are exothermic.
C. Group 1 are vertebrates, Group 2 are invertebrates.
D. Group 1 has exoskeletons, Group 2 has soft bodies.

Answer 1

I think the answer is A

Answer 2

1. B (invertebrates do not have spines, it depends on the animal if they have gills, same with being warm blooded)

2. C (some do not have endoskeletons. Invertebrates do not have backbones, and some animals do not have exothermic blood systems)

3. Not sure about the answer on this one. There's no picture to go along with it.