Which of the following communication methods would be most effective for a species that lives in the tropical rainforest and is active at night?
A. tactile
B. auditory
C. visual
D. chemical
Answer: D
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The figure below shows three mouse populations and their associated changes in the frequency of B, the allele for dark fur. The recessive b allele codes for white fur. After 20 generations, in which population would you be most likely to encounter a white mouse?
A. N1
B. N2
C. N3
D. There is an equal probability of encountering a white mouse in all three populations.
E. There is an equal probability of encountering a white mouse in populations N1 and N3 and this is higher than in N2.
Most species of Gram-positive bacteria are
a. photoautotrophic. b. photoheterotrophic. c. chemoautotrophic. d. chemoheterotrophic. e. photochemoautotrophic.
Silicobacter pomeroyi produces carbon monoxide dehydrogenases so that it can use carbon monoxide as a source of carbon.
Answer the following statement true (T) or false (F)
From the following answers, which is considered by most biologists to be the most accurate in supporting the theory of evolution?
A. fossils B. embryology C. DNA sequencing D. genetic equilibrium