Answer: Option E
Explanation:
During conducting the experiment, it was performed in control conditions. In this case the top predators were removed.
There were limited number of organism left at the place which compete with each other for the same resources.
Mussel and Barnacle were the two species left there which feed on the same resources for their needs. This is the reason there was loss of diversity.
A constant variable would be an element that remains unchanged and constant throughout the course of the experiment / investigation.
Evolution is not a random process. The genetic variation
on which natural selection acts may occur randomly, butnatural selection itself is not random at all.
<span>Scientists first developed the geologic time scale by studying rock layers and index fossils through out the whole world. With this information, scientists placed Earth's rock layers in order by relative age. Later, radioactive dating helped determine the absolute age of the divisions in the geologic time scale.</span>
