Answer the following statements true (T) or false (F)
1.A transfusion can provide passive immunity.
2.If an Rh- woman has two babies who are Rh+, her immune response to the second baby would be an example of a secondary immune response.
3.T cells direct humoral immunity while B cells govern cell-mediated immune reactions.
4.Lymph nodes have a crucial role in immunity.
5.Adaptive immune defenses provide a rapid, broad defense against any infectious agent.
1.TRUE
2.TRUE
3.FALSE
4.TRUE
5.FALSE
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Which of the following is not considered a photosynthetic organism, and so would not remove atmospheric CO2?
A. kelp B. elm tree C. human D. moss E. phytoplankton
Mules are __________ and are subject to
__________. a. all males; postzygotic reproductive isolation b. all females; postzygotic reproductive isolation c. all females; prezygotic reproductive isolation d. hybrids; postzygotic reproductive isolation e. hybrids; prezygotic reproductive isolation
An example of an animal that is a metazoan is a sponge
____________________ Indicate whether the statement is true or false.
An animal will preferentially feed on:
a. the largest prey it can find. b. the prey that provides the most calories relative to the size of the prey. c. the smallest prey it can find. d. the prey that provides the most calories relative to the size of the predator. e. the prey that provides the most energy relative to effort.