Answer:
Even though they might have a common ancestor there might be a closer common ancestor to the original ancestors than the organism you're looking at.
I hope this helps
Explanation:
D: All the variables are controlled except one.
Answer:
Ans: Central Nervous System
In an evolutionary sense, birds are a living group of dinosaurs because they descended from the common ancestor of all dinosaurs. Other than birds, however, there is no scientific evidence that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive.
The correct answer is A: cell
