A hermaphrodite is described by all of the following, except which statement?
A. An animal that can produce both eggs and sperm
B. An animal that develops from unfertilized eggs
C. An animal that can self-fertilize
D. An animal that switches from one sex to another over the course of its lifetime
E. An animal that produces both eggs and sperm but may require a partner for reproduction
Answer: B
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A scientist studying evolution of peppered moths (Biston betularia) in Michigan observed that the percentage of melanic moths increased by around 2% from 1960-1961. Has evolution occurred in this population?
A. No, because melanism wasn't adaptive at that time. B. No, because the frequency of the melanic moths did not change enough to be considered evolution. C. Yes, because the frequency of the melanic moths in the population changed over time. D. Yes, because the frequency of melanic moths decreased.
Y-linked traits are
A. known as hemizygous traits. B. known to skip alternate generations of males. C. carried only by males and transmitted only to males. D. known to skip alternate generations of males and are carried only by males and transmitted only to males. E. known as hemizygous traits and are carried only by males and transmitted only to males.
Which of the following is a characteristic of the cell membrane?
a. impermeable b. semipermeable c. fully permeable d. not permeable
You will NOT find a cell wall in which of these kinds of organisms?
A. plants B. animals C. fungi D. bacteria