Read this paragraph and answer the following question about it:
A scientist in Northern California is studying the tree rings of a very old redwood tree. He notices that the oldest tree rings are very narrow. As the rings move away from the center, he observes 15 rings that get wider and wider.

What can you determine about the climate during the 15-year period during which the tree rings grew wider?

A) the climate was warmer and wetter
B)the climate was warmer and drier
C)the climate was colder and drier
D)the climate was colder and wetter

C. The climate was colder and wetter

Explanation:

This is because the dry sites have low moisture and high temperature. The food competition within the tree is likely greater and the base of the stem is likely to receive a limited food supply and this could cause it to produce narrow rings

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation:

regents of the university of california v. bakke, 438 u.s. 265 (1978), was a landmark decision by the supreme court of the united states. it upheld affirmative action, allowing race to be one of several factors in college admission policy.