What is the hallmark of all horizontal gene transfers?
1) Transfer of DNA between organisms of the same generation
2) Transfer of DNA using a virus
3) The use of plasmids
4) Transfer of DNA from parent to offspring
Answer: 1) Transfer of DNA between organisms of the same generation
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Referring to the above diagram, the letter "D"
is used to label
a. the dendrites. b. the cell body. c. the neuroglia. d. the axon. e. none of these
A human ____________________ can be carried in just over 3,000 YACs. Fill in the blank(s) with the appropriate word(s)
In the year 2317, a group of human pioneers decide to colonize Mars. The distance between Mars and Earth prevents the possibility of new members joining the colony or the members of the colony interbreeding with humans on Earth
This situation is an example of A) extinction. B) the bottleneck effect. C) random mutation. D) continental drift. E) the founder effect.
Experimental Condition 1 of the accompanying figure, the distribution of Balanus suggests: that
In
a. interspecific competition kept Balanus from extending higher into the intertidal area.
b. intraspecific competition kept Balanus from extending higher into the intertidal area.
c. an unfavorable environmental factor kept Balanus from extending higher into the intertidal area.
d. Balanus is less motile than Chthamalus.
e. Balanus is more motile than Chthamalus.