How does the sperm of an angiosperm reach the egg?
A) via the pollen tube that grows from the pollen grain through the carpel tissues to the ovule
B) via the pollen tube that grows from the ovule to reach the pollen grain on the stigma
C) usually via an insect, which places sperm in the ovary while probing for nectar
D) by actively swimming down through the style to the egg
Answer: A
You might also like to view...
In the photograph of the zygote fungus Pilobolus, what are the dark "hats" atop of the structures?
a. hypha b. gametangium c. zygote d. sporangium e. nucleus
The “strings” of celery are composed of sclerenchyma tissue
____________________ Indicate whether the statement is true or false.
Tetrodotoxin blocks voltage-gated sodium channels and ouabain blocks sodium-potassium pumps. If you added both tetrodotoxin and ouabain to a solution containing neural tissue, what responses would you expect?
A) immediate loss of resting potential B) immediate loss of action potential with gradual loss of resting potential C) slow decrease of resting potential and action potential amplitudes D) No effect; the substances counteract each other.
The zig-zags in the Keeling Curve repeat:
What will be an ideal response?