Answer:
A. Many dinosaurs were present in upper layers of rock strata, but not in lower layers.
Explanation:
In my opinion, this is the best possible answer.
answer is D
antelopes with muscular legs are able to outrun their predators better than antelopes with poor muscle tone. they lived to reproduce .
Answer and Explanation:
Oxygen has 8 plus-charged protons. The number of minus-charged electrons is 8 electrons. Atoms have equal number of protons as electrons. However, protons are found in the nucleus of an atom and electrons in the outermost shells in constant motion.
Evolution is not a random process. The genetic variation
on which natural selection acts may occur randomly, butnatural selection itself is not random at all.
