If his sperm count is less than 20 million per millimeter, a man is considered

a. impotent. b. hormone intolerant. c. infertile. d. sterile.

Cell structure varies depending on its what?

7) When an experiment is repeated and the new results are different from the original results, what could you assume to be true? A) The results from both experiments are worthless.

Multiple sclerosis is a disease in which the myelin sheath is destroyed. What will happen to nerve conduction speed in affected neurons? Multiple sclerosis is a disease in which the myelin sheath is destroyed.

Soil erosion is the wearing down of soil. This map provides data on the rate of soil Erosion in the United States for a given year. What trend does the map show?

Five species of frogs that live in separate habitats within 5 non-overlapping ranges along the Mississippi River share a common ancestor. Which process is most likely responsible for the formation of these five distinct species

Flower color in a particular plant species is determined by one gene. The alleles of that gene can code for either red flowers or blue flowers. When a red plant and a blue plant are crossed, some of the offspring produce purple flowers.

Which is not an effect of smoking on the cardiovascular system? it contributes to atherosclerosis. it increases the blood's tendency to clot. it increases blood cholesterol. it increases the size of arteries and veins?

Mention the importance of pancreas

What substance is insoluble in water? quartz vinegar sugar salt

Curly hair, large nose, brown eyes: our give the instructions that determine human traits, like these?