Chromosomes are made of protein & a long, single, tightly-coiled DNA molecule. During the S phase of interphase, the DNA, which makes up the chromosome makes copies of itself. Each half of the chromosome is called a , which is held together by a centromere.

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."

Two critical interventions to turn around the opioid crises are:

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?