In a hypersensitive response:a
long-lasting resistance is built up throughout the plant.
b. the axillary buds break dormancy.
c. cryptochrome is synthesized.
d. jasmonic acid activates enzymes.
e. the infected area is sealed off by necrotic lesions.
E
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Obligately symbiotic relationships generally do not foster horizontal gene transfer at a higher rate than non-symbiotic relationships
Indicate whether the statement is true or false.
. A simplified form of the Fick diffusion equation is J = DA (C1-C2) where J is the rate of diffusion, D is a constant, A is the area across which diffusion is occurring, and C1 and C2 are the concentrations of the substance on either side of the membrane. Given this, which of the following would INCREASE the rate of diffusion of a solute?
A. an increase in C1 while holding C2 constant B. an equivalent decrease in both C1 and C2 C. an equivalent increase in both C1 and C2 D. a decrease in D E. a decrease in A
In mammals, the master clock is located in the:a
pineal gland. b. suprachiasmatic nucleus. c. crepuscular gland. d. biological clock. e. pituitary gland
Within the fluid mosaic of a plasma membrane, what is the role of transport and channel proteins?
A) They identify the cell. B) They may set off cellular changes such as cell division or hormone secretion. C) They prevent the passage of amino acids. D) They are cell-surface connection sites. E) They permit ions and water molecules to move through the plasma membrane.