Answer: A
Explanation:
Our universe was born from the Big Bang about 13.5 billion years ago. ... Our solar system began forming about 4.6 billion years ago within a concentration of interstellar dust and hydrogen gas called a molecular cloud. The cloud contracted under its own gravity and our proto-Sun formed in the hot dense center.
Answer:
a population or community.
Explanation:
DNA replication, Process during which a double- stranded DNA molecule is copied to ... You can determine the sequence of a complementary strand if you are given the ... DNA replication is not the same as cell division.