Which statement about plant hormones is true?
A) Plant hormones are produced in very small concentrations.
B) Plant hormones mainly affect reproductive processes.
C) A hormone typically has a single, specific effect on all cells.
D) Plant hormones play a vital role in photosynthesis.
Answer: A
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In a lysosomal storage disease, the hydrolases of lysosomes are released from the cells, rather than being isolated into vesicles. What is one possible mechanism for this result?
A) A proton gradient within vesicles was not generated. B) The ER was unable to produce lysosomal vesicles. C) Lysosomal enzymes were not phosphorylated in the rER. D) There is a lack of mannose-6-phosphatase activity. E) There is a mutation in all hydrolase genes that results in loss of the signal peptide.
What is the current situation regarding the
wheat stem rust fungus?
a. it has been eradicated b. it has wiped out most of the wheat around the world c. resistant wheat strains have made the fungus mostly ineffectual d. a new strain of wheat stem rust has emerged that is infecting resistant varieties of wheat e. it is only a problem in the United States
Which of the following is most directly associated with the theory of evolution?
a. Competition between members of a population for limited resources. b. Production of large numbers of offspring. c. Sexual reproduction producing variation in a population. d. Mutations changing the gene pool. e. Changing of populations over time.
The smallest unit that can participate in evolution is a ________
Fill in the blank(s) with correct word