Why is crossing over not possible in meiosis II?
A. Because the enzymes needed for it to occur are no longer present.
B. Because homologous chromosomes are no longer in the same cell.
C. Because prophase only occurs in meiosis I.
D. Because meiosis II is much shorter than meiosis I.
Answer: B
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Which of the following is a correct order of arrival in succession?
a. lichens and mosses cottonwood and willow trees Sitka spruce alders b. flowering plants shrubs lichens fir trees c. lichens and mosses alders and hemlock shrubs and grasses Douglas fir d. none of the choices
What does evolutionary fitness measure?
A. longevity B. relative reproductive success C. physical health D. population size
Diagram a typical life cycle for a basidiomycete. What will be an ideal response?
In his 1961 paper "The Paradox of the Plankton," ecologist G. E. Hutchinson noted that several species of algae coexist, sharing the same few mineral nutrient resources in homogeneous open-water systems
Because there is little chance of resource partitioning and niche differentiation in such a situation, the paradox of their coexistence is an apparent violation of A) Darwin's theory of evolution by means of natural selection. B) the law of mass action. C) the second law of thermodynamics. D) the climax theory of succession. E) the competitive exclusion principle.