Biology, 16.10.2019 16:00 Isaiahtate053
Which one of the following criteria is necessary for natural selection to occur?
a. individuals show no variation in fitness levels. b. individuals have the same adaptations. c. enough resources exist for individuals to survive and thrive. d. a struggle for existence is apparent.
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The images show two species of tree frogs in a particular region. the gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. the gray frog was abundant in the woodlands. because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. in such a case, the . the gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. this suggests that speciation occurred because of .
Answers: 1
Which one of the following criteria is necessary for natural selection to occur?
a. in...
a. in...
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