In which of the following groups is the pollen tube haustorial?
A) Conifers and gnetophytes
B) Conifers and cycads
C) Cycads and Ginkgo
D) Cycads and gnetophytes
E) Ginkgo and gnetophytes
Correct Answer:
Verified
Q5: Which of the following questions concerning the
Q6: _ produce nonmotile sperm.
A)Conifers and gnetophytes
B)Conifers and
Q7: After fertilization, the integuments develop into the:
A)seed
Q8: In which gymnosperms do multiflagellated sperm swim
Q9: A micropyle is a(n):
A)nutritive structure of the
Q11: The fossil record indicates that the integument
Q12: Polyembryony is common in gymnosperms because a(n):
A)seed
Q13: Just before fertilization, a gymnosperm ovule contains:
A)an
Q14: In seed plants, the _ is called
Q15: In gymnosperms, pollination occurs usually by:
A)insects.
B)water.
C)wind.
D)birds.
E)mammals.
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