Describe three strategies that can be used to treat contagious infections.

True or false. b cells originate and mature in the bone marrow and their function is to produce antibodies; t cells originate and mature in the thymus and their functions include killing cells that have been infected with a virus.

How could a change in an abiotic factor such as sunlight affect an ecosystem?

In what ways do you think modern nonvascular plants are different from other types of modern plants? In what ways do you think they are similar?

How does the muscle cell differ from the animal cell?

What can be done to improve soil fertility? A adding fertilizers to the soil B planting legumes C leaving crops unplanted for a season D all of these

Differentiate between the direct and indirect economic value of biodiversity

List three ways that sociologists study demography

Explain why the immune systems of most people do not injure their own cells

What is a plate? a the ocean floor b a continent c crust and upper mantle d large piece of the earth's crust

Chemical reactions in cells are faster than the same reactions outside cells. True or false?