Answer:
where is your other answer choices?
Explanation:
Answer:
coordinated regulation of a group of genes that encode proteins with a common function.
Answer: The correct answer is -
D) giraffes having increasingly longer necks over time.
Natural selection is an evolutionary mechanism that was proposed by Darwin.
According to this mechanism, organisms that are better capable of adapting to their changing environmental conditions, survive and increase their number through reproduction whereas other are eliminated from the population.
Example - Long neck of Giraffe, which is much elongated, lofty stature, that was beautifully adapted for browsing on the higher tree branches. This was an adaptation with slow and gradual change in the gene frequency as the lower vegetation was eaten by other animals. Due to this, giraffes had to search for other source (that was higher tree branches).
This is considered as a peculiar example of natural selection.
The variety of organisms that occupy a given region including microscopic protists to large mammals. The region can be a political unit such as a country a geographic feature such as a mountain range or the entire world. The first level of bio diversity is genetic diversity. Next is taxonomic diversity. Also ecological diversity.
