Which of the following was NOT a step in the evolution of the ovule?
A) Retention of the megaspores in the megasporangium
B) Production of only four megaspore mother cells per megasporangium
C) Formation of a highly reduced endosporic megagametophyte
D) Production of only one functional megaspore per megasporangium
E) Development of the embryo within the megagametophyte
Correct Answer:
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Q1: Seed plants evolved most directly from:
A)lycophytes.
B)ferns.
C)progymnosperms.
D)angiosperms.
E)trimerophytes.
Q3: Which extinct gymnosperms resembled modern cycads?
A)Seed ferns
B)Cordaitales
C)Bennettitales
D)Ophioglossales
E)Trimerophytes
Q4: Which of the following statements about gymnosperms
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
Q10: In which of the following groups is
Q11: The fossil record indicates that the integument
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