The few ancestors of the Galàpagos finches who colonized the islands would be an example of
A. a founder effect.
B. a bottleneck.
C. increased mutation rate.
D. natural selection.
E. gene flow.
A. a founder effect.
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Answer the following statements true (T) or false (F)
1. Nitrogen is one of the most abundantly applied fertilizers worldwide. 2. Aluminum is not an essential mineral for plants and therefore may cause toxicity. 3. When a mycorrhizal fungus associates with the roots of a plant, the fungus usually causes harm to the plant. 4. Inexpensive sources of phosphorus fertilizers are nearly exhausted.
The DO represents the _____ dose for human cells.
a) mean survival b) mean lethal c) 50% survival d) 50% lethal
The term for cancer of lymphatic tissue not related to Hodgkin's disease is
Fill in the blank(s) with the appropriate word(s).
Which of the following is an increase in blood flow?
a. Ischemia b. Hyperemia c. Septicemia d. Leukocytosis