Which of the following statements is true? A.
All plant cells have at least one vacuole, but only some animal cells have vacuoles.
B.
All animal cells have at least one vacuole, but only some plant cells have vacuoles.
C.
Only a few animal and plant cells have vacuoles.
D.
All animal and plant cells have at least one vacuole.

What kind of action is a cause of air pollution

In order to clone adult animals, scientists typically begin with a(n)

Aresearcher designed an investigation to test what effect eating different types of food would have on blood insulin levels. she selected 10 male subjects who were all 25 years of age and in good health. the experiment took place over 3 days. at 8: 00 a. m. on each day, the subjects ate a meal consisting of only 1 type of food. they had their blood insulin levels measured after consuming the meal. on day 1 they ate a high fat diet, on day 2 they ate a high protein diet, and on day 3 they ate a high sugar diel what is the independent variable in this experiment? a the age of the subjects b the blood insulin level c the type of food consumed d the time of day the meal was consumed