Root nodules are ____
a. intertwined roots of different species of plants
b. connecting points between branching roots
c. symbiotic associations between a fungus and plant roots
d. specialized root hairs
e. localized swellings in plant roots filled with nitrogen-fixing bacteriac
ANSWER: e
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The life threatening body-wide response that can occur when allergens enter the circulatory system and cause a severe
drop in blood pressure is called ____________________. Fill in the blank(s) with the appropriate word(s).
What is the purpose of plant hormones?
A) They are produced in small amounts but have great effects. B) They break down quickly after they are produced. C) They act only at the location where they are produced. D) They generally have one limited effect on the plant.
In general, most DNA viruses multiply in the host cell's ________, while most RNA viruses multiply in the host cell's ________.
A. cytoplasm; cell membrane B. cell membrane; cytoplasm C. cytoplasm; nucleus D. nucleus; endoplasmic reticulum E. nucleus; cytoplasm
Which of the following substances is not considered part of blood plasma?
A. dissolved O2 B. red blood cells C. albumin D. urea E. glucose