45. what is thought to be true about the three domains of living things?
a.
they diverged from a common ancestor fairly recently.
b.
they diverged from a common ancestor before the evolution of the main groups of eukaryotes.
c.
they did not have a common ancestor.
d.
domains bacteria and archaea evolved after the main groups of eukaryotes.

Ry was studying two populations of the same species of lizards. one population lived on an island and the other lived on the mainland. both populations were affected by a hurricane that hit the island and the mainland with equal force. a year later, henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. which best describes a conclusion he might have reached? gene flow greatly affects small populations, but large populations can recover. genetic drift greatly affects small populations, but large populations can recover. gene flow greatly affects large populations, but small populations can recover. genetic drift greatly affects large populations, but small populations can recover.

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?