Abinary star system is made of stars, one of which is brighter than the other. astronomers are able to detect the dimmer star because it's gravity causes the bright star to astronomers can also be spot the dimmer star by observing a phenomenon called a(n) binary. this happens when the den star passes in front of the bright.

two stars

wobble

eclipsing

The three answers are

1. two

2. wobble

3. eclipsing

Explanation:

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.