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
Correct Answer:
Verified
Q23: A pollen grain coat is composed of
Q25: Q27: The endosperm of a plant _. Q30: A pollen grain "knows" when to germinate Q36: Q42: The seed coat forms from the Q43: Seeds include all of the following EXCEPT Q49: Which of the following is the primary Q50: The primary function of the endosperm is Q51: Which of the following develop into seeds?
A)
A)zygote.
B)cotyledon.
C)nucleus.
D)integuments.
E)embryo sac.
A)endosperm.
B)seed
A)protection.
B)reproduction.
C)growth.
D)food
A)embryo
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