Answer:
evolutionary lineages from common ancestors
.
Explanation:
Fossils are the remains of organisms which are present very long time ago and now their specie is not alive. The study of these fossils helps us to know about the ancient animals and evolution of different organisms from these extinct organisms. They tells us about the evolutionary lineages in different existing organisms from common ancestors. These fossils also give us information about behavior and reproduction of these organisms.
Neither C or D, Hh means that C is a carrier but does not have sickle cell.
The answer to your question is A. You are correct
Answer: Chemical bonding
Explanation: Bonding by sharing electrons is known as covalent bonding and bonding by transferring electrons is known as ionic bonding. Both are a type of chemical bond that bond elements together into molecules.