Which of the following most likely happens when we exercise? a. the heart rate slows down because the blood vessels have less blood to circulate. b. the heart rate slows down because the blood vessels have more blood to circulate. c. the heart pumps faster so that the blood vessels can carry more oxygen to some cells. d. the heart pumps faster so that the blood vessels can carry more carbon dioxide to some cells.

In german cockroaches, curved wing (cv) is recessive to normal wing (cv+). bill, who is raising cockroaches in his dorm room, finds that the frequency of the gene for curved wings in his cockroach population is 0.6. in his friend joe’s apartment, the frequency of the gene for curved wings is 0.2. one day joe visits bill in his dorm room, and several cockroaches jump out of joe’s hair and join the population in bill’s room. bill estimates that, now, 10% of the cockroaches in his dorm room are individual roaches that jumped out of joe’s hair. what is the new frequency of curved wings among cockroaches in bill’s room? 0.69 0.4 0.5 0.31 0.20

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

Describe the layers of the suns atmosphere?