Multiple Choice
Which two structures of a flower bear sporangia?
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36. Plant Reproduction
Flowers
Back36. Plant Reproduction
Flowers
- Multiple ChoiceA generative cell and a tube cell originate when __________.1177views
- Multiple ChoiceHow many pollen grains can potentially result from one microsporocyte?1185views
- Multiple ChoiceWhat is the purpose of synergids in an ovule?1403views
- Multiple ChoiceIn the process of pollination, pollen grains are transferred from the __________ to the __________.2002views
- Multiple ChoiceLike gymnosperms, many grasses and angiosperm trees are wind-pollinated. To conserve energy, these angiosperms do not produce complete flowers (complete flowers have all four of the basic parts). Which basic part would most likely be missing from wind-pollinated angiosperm flowers?774views
- Multiple ChoiceHow do most flowering plants avoid self-fertilization?2650views
- Multiple ChoiceWhat is the underlying feature that allows plants to reproduce asexually?1260views
- Multiple ChoiceIn this type of asexual reproduction, seeds are produced even without the joining of sperm and eggs.1369views
- Multiple ChoiceIn an environment that is very stable, with reliable moisture and temperature, what type of reproduction would be most advantageous for a plant, and why?815views
- Multiple ChoiceWhich statement below accurately describes the role of S-genes in plants?940views1rank
- Textbook Question
Evaluate these statements about double fertilization. Select True or False for each sentence.
T/FTwo zygotes are formed, but only one survives.
T/FOne sperm fuses with an egg while the other sperm fuses with polar nuclei.
T/FIt results in the formation of a diploid embryo and triploid endosperm.
T/FBoth sperm involved in double fertilization form within the same pollen tube.
1111views - Textbook Question
Double fertilization means that:
a. Flowers must be pollinated twice to yield fruits and seeds
b. Every egg must receive two sperm to produce an embryo
c. One sperm is needed to fertilize the egg, and a second sperm is needed to fertilize the polar nuclei
d. Every sperm has two nuclei
1634views - Textbook Question
In angiosperms, each pollen grain produces two sperm. What do these sperm do?
a. Each one fertilizes a separate egg cell
b. One fertilizes an egg, and the other is kept in reserve
c. Both fertilize a single egg cell
d. One fertilizes an egg, and the other fertilizes a cell that develops into stored food
1731views - Textbook Question
In angiosperms, are sperm and eggs produced by mitosis or meiosis?
Which cells are spores?
Which structures are gametophytes?
1277views