What is the age structure of a population?
A) the curve that results when the likelihood of dying is plotted as a function of age
B) the curve that results when the likelihood of being alive is plotted as a function of age
C) the number of individuals alive in different age-groups at one time point
D) the difference in the age distribution of a population at two different points in time
Answer: C
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Embryonic cell cycles allow the rapid division of cells in the early embryo. These mitotic cell cycles are much shorter in length than the mitotic cell cycles of cells in a mature organism. In the embryonic cell cycles, mitosis takes approximately the same amount of time as it does in the cell cycles of mature cells. What do you think is a result of the embryonic cycle? 32. Following S phase, a human cell would have how many pairs of sister chromatids and individual DNA molecules?
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Pairs of maternal and paternal chromosomes line up between the two spindle poles during
a. metaphase I. b. telophase I. c. prophase II. d. metaphase II. e. anaphase II.
Which of the following would NOT be an action of the complement system?
a. lysis of a pathogen's membrane b. trapping of pathogens in tangled protein threads c. marking of pathogens for destruction by macrophages d. attraction of phagocytes to the scene of pathogen invasion e. membrane attack complexes
How is the structure of the lac repressor protein reflected in the operator sequence to which it binds?
What will be an ideal response?