Answer:
all living things have cells with a nucleus
Cells produces antibodies that are released into the bloodstream.
Phosphate would be the limiting factor, so the answer would be B. The experiment shows that the algae is only growing if phosphate is present and when it's absent the algae does not grow. Which means that phosphate is an important variable that will determine algae growth.
The energy role of a grizzly bear is that of a consumer because it cannot make its own food.
