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Biological Science Study Set 3

Biology

Quiz 38 :

Plant Reproduction and Development

Quiz 38 :

Plant Reproduction and Development

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Cottonwood, aspen, and willow trees have drab- coloured flowers with no petals that appear before the tree's leaves are out in the spring; they are dioecious. What does that indicate about these trees?
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Answer:

A

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While looking at a flower in your garden, you notice that it has carpels with very long styles and stamens with very short filaments. This plant is most likely to reproduce by
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Answer:

B

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Which of the following is another name for the female gametophyte?
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Answer:

E

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If an ovary contains 50 ovules, what is the minimum number of pollen grains that must land in order to form 50 mature seeds?
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Which theory have biologists associated with the occurrence of pollination syndrome?
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What is not true about the carpel of a flower?
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Most plants are adept at asexual reproduction. What is the probable explanation for the energy spent for sexual reproduction?
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It is estimated that animal- or insect- pollinated plants produce 1000 pollen grains for each ovule; wind- pollinated plants produce 1,000,000 pollen grains for each ovule. What does that indicate about pollination systems?
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How are the life cycles of liverworts and angiosperms alike?
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A summer occupation in the Corn Belt states is de- tasseling the corn: removing unwanted male flowers so that female flowers on the same plant are pollinated by the desired pollen for the hybrid corn. What does this tell you about corn?
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The sperm and egg each contribute 50% of the nuclear genetic material to the zygote that becomes the embryo and the new plant. Mitochondria and plastids that become chloroplasts are passed primarily from the female parent. What feature of the male or female gametophytes accounts for this?
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Angiosperms are unique in having double fertilization that forms endosperm. What is true about double fertilization in angiosperms?
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During self- fertilization, which of the following is absent?
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What is an essential part of alternation of generations in plants?
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What is the similarity between spores and gametes?
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A population of flowers varies from deep blue to nearly white. Bees are active during the day and prefer colour. Moths are active at night, when colours are not very visible and white is more conspicuous. Design a scenario in which the blue and white flowers form two species where there once was one species. You must end with a conclusion that the two new species cannot interbreed a definition of a species).
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Within which structure does meiosis and spore production occur?
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Which of the following correctly identifies the function of the flower part named?
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Male gametophytes are derived from which of the following via mitosis?
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What is the male gametophyte made of?
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