What factor is contributing to the decline in fish populations?
A) destruction of Girard Boro Parks wetland
B) elevated pollution levels in elk creek
C) dams being built
D) all of the above
Ans: D) all of the above
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An organ is defined as
a. a single tissue grouped together to perform a specific function. b. 2 or more tissues in specific proportions grouped together to perform a specific function. c. cells of different tissues linked together by the circulatory system to allow multiple functions. d. only the reproductive parts in plants. e. none of these.
Melatonin secretion influences ____.
A. secondary sex characteristics B. glucagon production C. adrenal function D. seasonal changes in behavior E. Graves’ disease
A plant cell in a hypotonic solution
A) becomes turgid because of an inflow of water. B) bursts because of an inflow of water. C) shrivels because of an outflow of water. D) wilts because of an outflow of water.
T-cell response to T-cell-dependent antigens requires
A. typically a protein antigen. B. binding of T-cell to a site on the antigen. C. binding of T-cell to a Class II MHC receptor on an antigen-presenting cell. D. interleukin-1 activating the T helper cell. E. All of these choices are correct.