What bone serves to anchor the tongue and muscles used for swallowing?
A. sternum
B. temporal bone
C. hyoid bone
D. mandible
Answer: C. hyoid bone
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The organization of the vasa recta around the loop of Henle:
A. allows urea to be concentrated in the distal convoluted tubule. B. allows water to be maximally reabsorbed from the distal convoluted tubule. C. allows the concentration gradient established by the loop of Henle to be maintained. D. allows urea to be concentrated in the distal convoluted tubule and allows the concentration gradient established by the loop of Henle to be maintained. E. allows water to be maximally reabsorbed from the distal convoluted tubule and allows the concentration gradient established by the loop of Henle to be maintained.
Mutations occur:
A. in every cell. B. in somatic cells, but not in germ line cells. C. in germ line cells, but not in somatic cells. D. during development but not during adulthood.
Which of the following statements about the cell cycle is correct?
A. The cell cycle is a sequence of replications and divisions that produces a new cells. B. The phases of the cell cycle are G1, S, and M phases. C. In actively dividing cells, the S and G2 phases are collectively known as interphase. D. When the S phase of the cell cycle is finished, a cell has twice as many chromatids as the number of chromosomes in the G1 phase. E. During G2 phase, the cell grows and copies its chromosomes in preparation for cell division.
One problem with eradicating invasive species is that sometimes the disturbed area is unable to be colonized by native species
For example, in forests where the invasive plant garlic mustard has been removed, native plants and animals do not recolonize because they are extinct in that patch of forest. How should restoration ecologists increase species diversity and recover ecosystem function? A) Introduce tertiary consumers. B) Develop movement corridors for primary producers. C) Develop movement corridors for species with similar niches. D) Eliminate keystone species.