Data in this figure suggest
A) butterfly populations are declining.
B) butterfly habitat is degrading over time.
C) butterflies are moving north over time.
D) two species of butterflies are evolving over time.
C
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Which of the following hypotheses is the most current and accepted one with regard to modern human origins?
A. the multiregional hypothesis B. the out-of-Africa hypothesis C. the convergent hypothesis D. the single regional hypothesis
In his monohybrid crosses, Mendel deduced that one trait was recessive because that trait was ____
a. not present in the F1 and did not reappear in the F2 b. present in the F1 and in the F2 c. not present in the F1 and reappeared in the F2 d. present only in the parents e. present only in the F2
At the base of the food web in aquatic ecosystem are:a
algae. b. Euglena. c. plankton. d. plants. e. fish.
Which of the following statements about the Galápagos finches is false?
A) The Galápagos finch species differ in their feeding habitats. B) Each island in the Galápagos chain has one and only one isolated, unique species of Darwin's finch. C) Most speciation events of the Galápagos finches occurred when some finches made it to another island, evolved in isolation, and accumulated enough changes to become a new species. D) The evolution of the Galápagos finches is an excellent example of adaptive radiation.