According to the principle of German biologist Karl Bergmann, warm-blooded animals living in cold climates tend to be ... bigger? or smaller?... than animals of the same species living in warm climates.

Which animal has the longest gestation period, about 645 days almost 2 years

How is it possible to determine the sex of a parakeet?

How many legs do each of these animals have? a. Lobster? (claws considered legs) b. Spider? c. Grasshopper?

Which animal is the largest member of the cat family?

What are two common names for jumping, tailless amphibia?

Animal names: If a male chicken is called a rooster and a female chicken is called a hen, …a. What do you call a male cat? B. What do you call a female, mature horse? C. What do you call a young swan?