In the earliest stages of development the embryos of a fish, calf, human, and tortoise all look similar. in the next stage the calf and the human look most alike. what assumption can be made based on this similarity?

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

What function does a limb serve in each animal how are the limb bones of the four animal similar based on the similarities what can be inferred about the evolution of the poor animals