The only process that can lead to adaptations and directed genetic change of a population is:
a. natural selection.
b. mutation.
c. migration.
d. genetic drift.
e. inbreeding.
A
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The buffering effect of the balance between carbon dioxide, bicarbonate, and carbonate is stronger in freshwater than it is in the marine environment.
Answer the following statement true (T) or false (F)
The phase of mitosis in which the nuclear envelope re-forms is
A. C, which is anaphase. B. E, which is telophase. C. B, which is prophase. D. D, which is metaphase. E. A, which is prometaphase.
If a plant produces microspores and megaspores, then by definition, it is homosporous
____________________ Indicate whether the statement is true or false.
The Permian mass extinction is associated with ________
A) an asteroid impact B) global warming C) the formation of Pangaea D) the diversification of mammals