tricuspid valve is located between the right atrium and ventricle
Answer:
The answer to the first one is B. A mechanism for the evolution of a population to become better adapted to their environment over many generations.
The answer for the second one is C.vestigial
Explanation:
Love and Unity :) just kiddddding aging cells stop dividing because they become senescent. They do this by sending chemical signals to each other so that they know
B.the mass of carbon dioxide plus water is less than that of paper plus oxygen.
Water accounts for most of a cell's mass!
