The number of extinctions of birds and mammals has gone up as human populations have increased.
Answer the following statement true (T) or false (F)
True
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When Darwin covered the tip of a grass seedling with metal foil and then illuminated it from one side, what happened to the seedling?
A. It bent away from the directional light. B. It did not respond to the directional light. C. It grew toward the light, as expected. D. It waved back and forth. E. It wilted and died.
If a small population of mice colonizes a new area away from the range of the original species, the
colony that is geographically isolated may eventually evolve into a new species. These events can be used to describe:a. allopatric speciation. b. hybridization. c. allopolyploidy. d. adaptive radiation. e. sympatric speciation.
The fact that tracheophytes can survive on land is due to which of the following?
A. alternation of generations B. A dominant gametophyte stage C. Adaptation to damp habitats D. Water transport through vascular tissues E. Mechanisms other than photosynthesis for carbohydrate production
Select the conditions that cause evolutionary change
A. Natural selection B. Gene flow C. Nonrandom mating D. Acquired characteristics E. Genetic drift F. Mutations