Lichens are adversely affected by
A. sunlight.
B. humidity.
C. sexual reproduction of the fungal partner.
D. asexual reproduction of the photosynthetic partner.
E. pollution.
Answer: E
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Indicate whether the statement is true or false
The possible combinations of alleles in the gametes of an individual with the genotype aaBb are
A. AB, Ab, aB, ab. B. aa, Bb. C. aB, ab. D. aa, ab, aB.
Allergic reactions are triggered by the release of ________ from certain cells.
A. serotonin B. epinephrine C. acetylcholine D. histamine
At the end of DNA replication, the sister chromatids are held together by the ___________
(a) kinetochores. (b) securins. (c) cohesins. (d) histones.