Fusion of a sperm cell with the large central cell in an angiosperm embryo sac produces:
A) the zygote.
B) a pollen tube.
C) a spore.
D) the endosperm.
Answer: D) the endosperm.
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A database is defined as
A. A large collection of files stored in one place B. A small collection of files that are stored in different places C. Files that are only used by the BLAST program D. A large collection of files that are not annotated.
Which of the following is NOT an immature stage of an animal?
A. nauplius B. trochophore C. caterpillar D. nymph E. swimmeret
Place the following events of fertilization in the correct chronological order.
(1) Sperm contacts the cumulus mass. (2) Proteolytic enzymes are released from the acrosome. (3) Sperm contacts the plasma membrane of the ovum. (4) Sperm passes through the zona pellucida. (5) Sperm increase ATP production. A. 5,1,2,4,3 B. 1,5,4,3,2 C. 1,2,4,3,5 D. 5,2,4,3,1 E. 3,5,2,1,4
An asexual spore produced by a sac fungus or club fungus is called a(n)
A. sporangiospore. B. ascospore. C. zygospore. D. conidiospore. E. basidiospore.