Korarchaeota ____
a. includes halophiles
b. includes psychrophiles
c. diverged very early in Archaean evolution
d. includes halophiles and thermophiles
e. diverged very late in Archaean evolution
ANSWER: c
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A seed from a yew tree germinates on the forest floor. During the first few months of its life, the sapling dedicates most of its resources to increasing in height rather than producing the defensive compound taxol
What is this allocation of resources an example of? A. a symbiosis B. a trade-off C. a constitutive defense D. an inducible defense E. a basal response
Lungs evolved from the __________ of fish
a. gills b. integuments c. circulatory systems d. gut walls e. thoracic walls
Protein that forms a channel to allow a particular molecule or ion to cross the plasma membrane.
What will be an ideal response?
A gamete from a human male contains:
A) 23 autosomes and a Y chromosome. B) 23 autosomes and an X chromosome. C) 23 autosomes and either an X or a Y chromosome. D) 22 autosomes and either an X or a Y chromosome. E) 22 autosomes, one X chromosome, and one Y chromosome.