What might happen over time if two bird species competed for the same seed resource and one preferred larger seeds while the other species preferred smaller ones?
A) Species would repeatedly switch between small and large seeds.
B) Beak sizes might shift over time.
C) Both species would die out via competition.
D) Seed size will shift larger over time.
B
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Which of the following statements about the physiological responses of plants to increasing temperatures and carbon dioxide levels is false?
A. Many plants devote more resources to reproduction under these conditions. B. Many plants produce flowers earlier in response to increased temperatures. C. Many plants produce leaves earlier in response to increased temperatures. D. The amount of nitrogen in plant tissues declines in response to increased CO2. E. None of the answer options is false.
One reason plants often do not survive indoors is because they lack adequate amounts of:
A. water B. minerals C. light D. proper temperature E. All of these could be true
Which type of leishmaniasis is an important opportunistic infection associated with HIV?
a) Cutaneous b) Mucocutaneous c) Visceral d) Systemic
The best definition of evolutionary fitness is __________________________.
A. physical health B. the ability to attract members of the opposite sex C. the ability to adapt to the environment D. survival and reproduction relative to other members of the population E. overall strength