Since viruses have no active methods of entering plant cells, they must rely upon mechanically caused wounds, vegetative propagation of plants, grafting, seed, pollen, and being carried on the mouth parts of chewing insects. Tobacco mosaic virus is most commonly introduced into plants through small wounds caused by handling and by insects chewing on plant parts. What would prevent viruses from easily entering plant cells?
a. The cell wall on the virus
b. The plasma membrane on the plant
c. The cell wall on the plant
d. The plasma membrane on the virus
e. The protein coat on the virus
c. The cell wall on the plant
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A Venus fly trap’s niche in an ecosystem is as
a ________.
a. producer b. primary consumer c. second-level consumer d. producer and primary consumer e. producer and second-level consumer
What is the first step in the pressure flow mechanism of translocation?
A) Sugar is loaded into the xylem at the source. B) Sugar is loaded into the phloem at the source. C) Water is loaded into the phloem at the source. D) Water is loaded into the phloem at the sink.
Aseptic means
A) sterile. B) free of all microbes. C) clean. D) sanitized. E) free of pathogens.
Which of the following cannot be estimated using traditional linear regression techniques?
A. log(Y) = ?0 + ?1log(X) + Ui B. Y = ?0 + ?1log(X) + Ui C. log(Y) = ?0 + ?1X + Ui D. None of the answers is correct.