Charles Darwin did not know how organisms inherited traits or why traits varied between members of the same species. Explain to Darwin how traits are inherited and what the source of their
variation is.

Many kangaroo rats live in the sonoran desert of the southwestern united states. they have a variety of adaptations for living in the desert. under which circumstance would the kangaroo rats of the sonoran desert be most likely to develop new adaptations by natural selection?

Out of the seven main animal groups (fish, mammals, birds, insects, reptiles, amphibians, and arachnids), how many contain members with internal backbones? a. 5 b. 3 c. 7 d. 1

Aplant may open end close its stomata to prevent excess water loss and maintain