Leaf aging is retarded by ____

a. salicylic acid
b. abscisic acid
c. cytokinins
d. ethylene
e. gibberellins.


ANSWER: c

Biology & Microbiology

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The value for ? in root tissue was found to be -0.15 MPa. If you take the root tissue and place it in a 0.1 M solution of sucrose (? = -0.23 MPa), the net water flow would _____

A) be from the tissue into the sucrose solution B) be from the sucrose solution into the tissue C) be in both directions and the concentration of water would remain equal D) be impossible to determine from the values given here

Biology & Microbiology

The edema (swelling) associated with inflamed tissue comes from:

a. the increased blood flow to the tissue b. a decrease in the diameter of the blood vessels in the tissue c. damage to the lymphatic vessels in the area d. the response of the irritated nerve endings

Biology & Microbiology

Autosomal recessive genetic disorder that causes a lack of the enzyme that metabolizes phenylalanine; the accumulation of phenylalanine causes problems with nervous system development and function.

What will be an ideal response?

Biology & Microbiology

Transfer RNA brings amino acids to ____________, where they are joined together to form proteins.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology