Some scientists think that complex eukaryotic cells formed from the Union of two separate prokaryotic cells. The engulfing or one prokaryotic cell by another is a plausible explanation of why A eukaryotic cells lack the defense mechanisms of prokaryotic cells. B eukaryotic cells don't share any similarities with prokaryotic cells. С organelles in a eukaryotic cell work cooperatively D organelles in a eukaryotic cell would attack other cells. Time Remaining 1 hour 15 minutes​

Are produced in the light reactions and used in the calvin cycle. a)nadh and atp b)electrons and sugar c)nadt+ and adp d)sugar molecules

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

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