How are the majority tree species responding to climate change in terms of distribution?
A) moving north
B) moving south
C) contracting in range
D) no change in distribution
C
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When humans are developing in utero they have characteristics that are not found in the fully developed infant. Which type of homology does this typify?
A. Structural. B. Molecular. C. Developmental. D. Both developmental and vestigal. E. Vestigal.
The open ocean is a(n) ________ environment.
A. oligotrophic B. phylotrophic C. eutrophic D. neotrophic
A sterile mule is produced by mating a horse and a donkey. From this observation you could conclude
A. that horses and donkeys are the same species. B. that horses and donkeys are different species. C. that mules are a result of macroevolution. D. increasing the number of mules in a population will affect the allele frequency in the next generation. E. the DNA sequences of horses and donkeys are more than 97% identical.
Which of the following most accurately describes how sickle-cell disease impacts the body?
A. Because of the impacts on the immune system, individuals with sickle-cell actually have an increased immunity and are less likely to become sick. B. Red blood cells clump up, blocking capillaries within the alveoli, resulting in acute chest syndrome, marked by pain, fever, and shortness of breath. C. The lack of oxygen results in swollen capillaries in joints, causing joint pain. D. Red blood cells clump up, blocking capillaries within the spleen, causing the spleen to shrink and lose function.