Homoplasies are useful characters for phylogenetic analyses
Indicate whether the statement is true or false.
ANS: F, homologous characters
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Analogous structures have
a. different functions but similar structures. b. similar functions but different structures. c. similar structures and similar functions. d. different structures and different functions. e. none of these
Which of the following types of mutations are thought to be the LEAST common?
a. somatic mutations b. germ-line mutations c. neutral mutations d. harmful mutations e. beneficial mutations
In a study often referred to as the "casual sex study," randomly selected men and women were asked if they would like to have sex with the experimenter. Men turned out to be more likely to accept this proposal than women. This is most likely because:
a) men are trying to get in as many matings as possible to lower the variance reproductive success, but women already have low variance in reproductive success. b) men are consciously trying to maximize their reproductive success while women are responding by rules of thumb. c) the female experimenter propositioning the men was far more attractive than the male experimenter propositioning the women thus the experiment was poorly designed giving biased results. d) men have a lower initial investment than women so they will be less discriminating in choosing a mate. e) men benefit from additional matings while women do not.
Summarize the scientific and ethical advantages and disadvantages of using embryonic stem cells versus adult stem cells for stem cell therapies
What will be an ideal response?