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 most viruses from easily entering plant cells?
A. the cell wall of the plant
B. the plasma membrane of the virus
C. the protein coat of the virus
D. the cell wall of the virus
E. the plasma membrane of the plant
A. the cell wall of the plant
Biology & Microbiology
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Each chromosome has one or more ________ site(s) where replication begins.
A. promoter B. replicon C. bifurcate D. origin
Biology & Microbiology
Fungi, together with bacteria, are the principal _________ in the biosphere.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
In the above figure, which of the following
would have a diploid number of chromosomes? a. A b. B c. C d. D e. A and B
Biology & Microbiology
A faster than normal heart rate is called
a. tachycardia. b. bradycardia. c. hypocardia. d. hypercardia. e. bradykinin.
Biology & Microbiology