| A | B |
|---|
| If a bird has a hooked bill and sharp talons, it might be a (an) | bird of prey |
| Insect-eating birds are beneficial to human society because they | help keep mosquito populations under control |
| Mammals are characterized by each of the following EXCEPT | three-chambered hearts |
| A feature that is present in most female mammals is | viviparous development |
| To determine whether a vertebrate is a bird or a mammal, it would be useful to know if it | has hair |
| Which organ is used by a cow to feed her newborn calf? | mammary gland |
| The mammalian circulatory system consists of | two separate loops powered by a four-chambered heart |
| In mammals, the amount of water in the body is controlled mainly by the | kidneys |
| The egg-laying mammals are called | monotremes |
| An example of an animal with a marsupium is a(an) | kangaroo |
