Because the oxygen rich and oxygen poor blood mix in the frog's heart, you would expect it to beat in order to deliver the same amount of oxygen as a human heart

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Describe the layers of the suns atmosphere?

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.