The critical ________ is the most important limiting factor that determines where a species lives.
Fill in the blank(s) with the appropriate word(s).
Factor
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Under the conditions of a given reaction, a positive ?G' means
A) the reaction is spontaneous. B) no energy needs to be added. C) the reaction is at equilibrium. D) work can be done. E) the reaction will not occur.
Identify the appropriate DNA homolog, or complementary sequence, that could be used as a probe for in situ hybridization to the following target RNA: 5'-AUGCGAUUC-3'
a. 5'-TACGCTAAG-3' b. 5'-ATGCGATTC-3' c. 5'-GAATCGCAT-3' d. 5'-AUGCGAUUC-3'
CD4 cells are also known as
A. T helper cells. B. natural killer cells. C. T cytotoxic cells. D. macrophages. E. neutrophils.
Two species of the garter snake in the genus Thamnophis are found in the same geographic region. These species are not likely to meet and attempt to reproduce because one lives mainly in the water, while the other species spends most of its time on land. This is known as
A. habitat isolation. B. temporal isolation. C. zygote mortality. D. behavioral isolation.