If a cell membrane is pierced with a very fine needle,
the cell will subsequently
a. explode.
b. seal itself.
c. collapse.
d. absorb fluid from the outside and grow.
e. do none of these.
Answer: b
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If meiosis did not occur in sexually reproducing organisms, ____
a. the zygote would be haploid. b. gametes would be haploid. c. mitosis would be sufficient. d. the chromosome number would double in each generation. e. eggs would be diploid but sperm would be haploid.
Choose the letter of the best match from the following:A. Abscisic acidB. TrichomesC. AquaporinD. EndodermisE. StomaPore in plasma membrane that allows water movement.
Fill in the blank(s) with the appropriate word(s).
No matter what model is used to show community succession, the final stage is always
A. a community at equilibrium. B. a stable community. C. a secondary community. D. a climax community. E. a disturbed community.
Penicillin is an antibiotic that inhibits enzymes from catalyzing the synthesis of peptidoglycan, so which prokaryotes should be most vulnerable to inhibition by penicillin?
a) gram-positive bacteria b) archaea c) mycoplasmas d) gram-negative bacteria e) endospore-bearing bacteria