Which of the following most likely coincides with mass extinction in the geologic time scale?
A: rapid global changes to the environment
B: long periods of environmental stability
C: the introduction of native species to a new environment
D: the removal of nonnative resources from an environment
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Ответ:
A. Rapid global changes to the environment
Explanation:
Rapid global changes would likely create unsuitable envoronment for some species, and due to the fact that these changes occured quickly, the populations would not have time to adapt and evolve.
Ответ:
Plant cells are arranged in tight squares due to their cell walls and are filled with water. These characteristics give the plant a structural support.