Which of the following statements best describes what happens during exercise? (Please explain why each of the incorrect statements are wrong. Thank you!)

A.
Blood vessels in the muscles dilate to increase blood flow.

B.
Blood vessels in the heart dilate to increase blood pressure.

C.
Blood vessels in the organs dilate to increase blood oxygen.

D.
Blood vessels in the lungs dilate to increase blood volume.

Sampling lake water for microscopic organisms is not as easy as it sounds when you want to both count and identify species. in a given water sample, your bacteria of choice can be rare or difficult to culture, particularly given the mixture of bacteria in a biofilm. which of the following culture media would be best for growing fecal coliforms when they are relatively less abundant than other bacteria in the lake? anaerobic culture medium enrichment culture medium complex culture medium basic culture medium

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million