Trisomy 21 is a consequence of _________________, the unequal distribution of chromosomes during meiosis.
a. crossing over
b. cytokinesis
c. chorionic villus sampling
d. recombination
e. non disjunction
Ans: e. non disjunction
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What type of energy is the energy in chemical bonds?
a. solar energy b. activation energy c. kinetic energy d. potential energy e. thermal energy
The chromatids detach from one another and
become visibly separate chromosomes during a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase
If you wished to obtain the strongest phototropic response from a shoot, which wavelength of light
would you use? a. less than 500 nm b. 660 nm c. 730 nm d. 800 nm e. more than 800 nm
Plants do not have a germ line and gametes are derived from cell lines that are also responsible for the growth of the organism. Can you apply the disposable soma hypothesis?
a. Yes, trade-offs between reproduction and repair are still conceivable. b. Yes, plants have a much higher physiological tolerance for the effects of mutations. c. No, the distinction between somatic cells and germ line is at the heart of the hypothesis. d. No, plants do not produce eggs or sperm but gametophytes that represent an additional genera-tion.