Species such as mice have a better chance of surviving sudden environmental change than elephants because elephants
A. reproduce much more slowly than mice.
B. have a more selective diet than mice.
C. live longer than mice.
D. require larger habitats than mice.
E. eat more than mice.
A. reproduce much more slowly than mice.
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A mutation that is characterized by a change in the DNA sequence, but no change in the resulting protein sequence, is a
A) frameshift mutation. B) missense mutation. C) silent mutation. D) nonsense mutation.
Explain the four major functions of the kidneys and how they relate to homeostasis.
What will be an ideal response?
The high osmolarity of the renal medulla is maintained by all of the following EXCEPT _____
A) active transport of salt from the upper region of the ascending limb B) the spatial arrangement of juxtamedullary nephrons C) diffusion of urea from the collecting duct D) diffusion of salt from the descending limb of the loop of Henle
Why must the life cycle of sexually reproducing species alternate between haploid and diploid stages?
A. Haploid cells cannot grow independently of diploid cells. B. Meiosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation. C. Meiosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation. D. Mitosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation. E. The diploid stage allows for genetic recombination.