Pollen requires all of the following to germinate
EXCEPT
a. contact with epidermal cells of the stigma
b. binding to the stigma by species specific
adhesion proteins
c. nutrients to diffuse into the dry pollen
d. metabolism to begin in the two cells in the
pollen grain
e. all of these are required
Answer: e
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is expected to show the most growth in the future.
a. prereproductive; short; high b. reproductive; short; high c. reproductive; long; low d. postreproductive; long; low e. prereproductive; short; low
Hepatitis B can be spread by what
What will be an ideal response?
Filtering of blood and recycling of dead red blood cells are functions of the:
A) liver. B) spleen. C) pancreas. D) kidneys.
Which pair of values best fills in the blanks in this statement: On average, eukaryotic cells are __________ times longer and have _________ times more volume than prokaryotic cells
(a) 5, 100 (b) 10, 200 (c) 10, 100 (d) 10, 1000