Why do most plants produce large numbers of seeds?
a. Most seeds are not viable.
b. Most of a plants seeds are produced as food for animals that disperse the seed.
c. Most plants have many flowers.
d. Most plants only flower once
e. Few seeds survive, germinate and grow into mature individuals.
ANSWER: e
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Which of the following populations is most likely to evolve?
A. a population of bacteria living in a thermal vent B. a population of bacteria living in a vernal pool C. a population of bacteria living in the equatorial rainforest D. a population of bacteria living in the arctic circle
Some cells within a female will have a condensed paternal X chromosome and some cells within the same individual will have a condensed maternal X chromosome. Explain how this occurs
What will be an ideal response?
They famous Urey-Miller experiments provided crucial support for which hypothesis?
a. the Endosymbiosis hypothesis b. the Oparin-Haldane hypothesis c. the RNA World hypothesis d. the Dickerson oxidizing atmosphere hypothesis e. the Hydrothermal vent hypothesis
Which of the following is the correct sequence of PCR?
A) Heat to 90°C (to separate DNA), then cool to 50°C (to bind primers and enzymes), and then reheat to 70°C (to synthesize DNA). B) Heat to 90°C (to bind primers and enzymes), then cool to 50°C (to separate DNA), and then reheat to 70°C (to synthesize DNA). C) Heat to 70°C (to bind primers and enzymes), then cool to 50°C (to synthesize DNA), and then reheat to 90°C (to separate DNA). D) Heat to 70°C (to separate DNA), then cool to 50°C (to bind primers and enzymes), and then reheat to 90°C (to synthesize DNA).