What structure in the brain controls the chemical responses that signal the sex hormones to make us either male or female? a) All of these
b) The pituitary
c) The RAS
d) The adrenals

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.