The answer is A it occurs before DNA is copied.
Phytoplankton refers to the microscopic marine species that thrive at the bottom of the food chain. They obtain their energy from carbon dioxide via photosynthesis, like plants and thus are very essential in carbon cycling.
Phytoplankton forms the base of almost every ocean food web. Thus, it can be stated that they make the majority of other ocean life possible. They are the source of food for zooplankton and small fishes, as well as for larger animals like jellyfish and whales.
Thus, if the population of phytoplankton gets declined, it will indirectly affect other species in the aquatic ecosystem. It can also be said that with the decrease in the population of phytoplankton, the population of other major species in the ecosystem also gets a decline.
1) The scenario is a controlled experiment because there were controls and a single experimental group in order to find correlations in data. The manipulated variable would be the fertilizer because it is the only factor different between Group A and Group B.
2) A one-time trial is not sufficient enough in terms of evidence to support a theory. Theories have numerous repetitions and replications to prove the correlation to be strong.
3) (The graph does not appear, but I can assume there are labels on the axes.) The labels on the graph's axes show that the y-axis is the plant growth over time.
Answer:
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When you run your blood vessels expand and the blood flowing through your body gets warmer. the ring gets tighter because of the expansion in blood vessels through the body. they do this in order to let blood pump faster.