What field of study uses geographic distribution of extinct and living species to determine patterns of evolution?
A. Biology.
B. Geology.
C. Palentology.
D. Geneology.
E. Biogeography.
E. Biogeography.
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Bromthymol blue (BTB) is colored below pH 6.0 and colored above pH 7.6
(a) blue, yellow. (b) yellow, green. (c) red, blue. (d) yellow, blue.
Karyo types generally remain constant within a species because
A) rearrangements occur frequently. B) changes in chromosome number occur infrequently. C) genetic instabilities produced by genomic changes are usually at a selective disadvantage. D) genetic imbalances are often at a selective advantage.
What percentage of the surface of the earth is covered by seawater?
a. 46% b. 55% c. 64% d. 71% e. 83%
The Mars expeditions are looking for life in which of
the following? a. air b. rock c. water d. subsurface soil e. archeological sites