Which cell structures are correctly paired with
their functions?
(1) the mitochondria produce enzymes, and
ribosomes transport them.
(2) the ribosomes make proteins, and the
nucleus stores genetic information.
(3) the cell membrane makes enzymes, and
cytoplasm transports them.
(4) the vacuole stores genetic information, and
chloroplasts make proteins.

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

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

Ascientific idea becomes valid when it is what?