Does reproductive cloning always involve somatic cell nuclear transfer? What will be an ideal response?
No, reproductive cloning can also be done by embryo splitting. This occurs naturally in the case of
identical twins, but can also be done by technicians teasing the embryo apart from an early,
multicellular stage. However, to clone an adult animal SCNT would be necessary.
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Imagine you are a doctor and you are presented with a female patient who has been unable to get pregnant despite 2 years of trying with the same partner. Rank the following factors from most important (#1) to least important (#4) in your determination of the cause of her apparent infertility.
a. Her STD history b. Her hormone levels c. Her partner's age d. Her age
Competitive exclusion is based on the idea that
a. one species will hold some sort of advantage over the other one. b. no two species can completely occupy the same niche. c. the more two species overlap in their capacity to obtain and use resources the less likely they are to coexist. d. all of these are true. e. none of these are true
Icosahedral viruses are constructed from ring- or knob-shaped units called ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT an exclusive criterion for eusociality?
a. reproductive division of labor b. division of labor c. cooperative rearing d. overlapping generations e. B and D