Which statement best describes fertilization in the fern life cycle?
a. Pollen is blown by the wind to a female cone, where it forms a pollen tube that grows toward where the egg
will form.
b. Flagellated sperm swim in a film of water on the surface of the plant to reach an egg.
c. Flagellated sperm are blown by the wind to a location near an egg, and then swim through plant fluids to reach
the egg.
d. Flagellated sperm swim through plant fluids to reach an egg.
e. Flagellated sperm attach to the moist skin of certain animals and are transferred to the surface of the plant to
reach an egg.
ANSWER: b
You might also like to view...
In country X, a chemical released into a forested area had a strong fungicidal effect. As a result many of the fungi comprising mycorrhizae have died. What may be the consequences of this chemical release?
What will be an ideal response?
Interleukins activate and direct the movement of white blood cells from the blood to the tissues
____________________ Indicate whether the statement is true or false.
The first panel of the sequence in the accompanying figure reflects:
a. trial-and-error.
b. negative reinforcement.
c. an irrelevant stimulus.
d. the conditioned response.
e. the unconditioned response.
Many mammals supply energy to their young in the form of ________.
Fill in the blank(s) with the appropriate word(s).