Biology 172 Quiz 9

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tulipyoursweety
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246219
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Biology 172 Quiz 9
Updated:
2013-11-13 03:03:18
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biology 172 quiz exam
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Plant Reproduction, Development and Growth Plant Responses to Internal and External Signals
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  1. A flower is missing petals. We would refer to such a flower as being _______ .
    A.asexual
    B.imperfect 
    C.unisexual 
    D.incomplete 
    E.complete
    D.incomplete
    (this multiple choice question has been scrambled)
  2. A fruit almost always includes 
    A.one or more seeds 
    B.the ovary wall 
    C.brightly colored pigments to attract animal dispersers 
    D.fleshy cells rich in sugars
    E.both A and B
    both A and B
  3. A mature angiosperm pollen grain (before pollen tube formation) is composed of _____ cell(s).
    A.one
    B.four 
    C.two 
    D.five
    E.three 
    C.two
    (this multiple choice question has been scrambled)
  4. A mutation in which of the following floral parts would have the greatest impact on pollination?
    A.sepal 
    B.petal 
    C.stamen 
    D.carpel
    E.either C or D
    either C or D
  5. The endosperm of a seed functions primarily to
    A.attract the sperm nuclei to the egg in the ovule
    B.absorb water causing the seed embryo to expand and break out of the seed coat 
    C.attract pollenating insects to the flower 
    D.store nutrients for the developing plant embryo 
    E.carry out photosynthesis while the seed is dormant 
    D.store nutrients for the developing plant embryo
    (this multiple choice question has been scrambled)
  6. What is typically the result of double fertilization in angiosperms? 
    A.Two embryos develop in every seed. 
    B.A triploid zygote is formed. 
    C.The fertilized antipodal cells develop into the seed coat.
    D.Both a diploid embryo and triploid endosperm are formed. 
    E.The endosperm develops into a diploid nutrient tissue.
    D.Both a diploid embryo and triploid endosperm are formed.
    (this multiple choice question has been scrambled)
  7. Which of these structures is unique to the seed of a monocot? 
    A.seed coat 
    B.cotyledon 
    C.coleoptile
    D.endosperm 
    E.radicle
    C.coleoptile
    (this multiple choice question has been scrambled)
  8. Which is NOT a component of a carpel? 
    A.stigma 
    B.sepal
    C.style
    D.megasporangium 
    E.ovary 
    B.sepal
    (this multiple choice question has been scrambled)
  9. A long-day plant will flower if 
    A.the duration of continuous darkness is less than a critical length 
    B.the duration of continuous light exceeds a critical length
    C.it is kept in continuous far-red light 
    D.the duration of continuous light is less than a critical length 
    E.the duration of continuous darkness exceeds a critical length
    A.the duration of continuous darkness is less than a critical length
    (this multiple choice question has been scrambled)
  10. Both red and blue light are involved in 
    A.tracking seasons.
    B.photoperiodism. 
    C.stem elongation. 
    D.positive phototropism. 
    E.all of the above
    C.stem elongation.
    (this multiple choice question has been scrambled)
  11. Ethylene, as an example of a plant hormone, may have multiple effects on a plant, depending on all of the following except the 
    A.readiness of cell membrane receptors for the ethylene 
    B.altered chemical structure of ethylene from a gas to a liquid 
    C.site of action within the plant 
    D.concentration of ethylene
    E.developmental stage of the plant
    B.altered chemical structure of ethylene from a gas to a liquid
    (this multiple choice question has been scrambled)
  12. If a short-day plant has a critical night length of 15 hours, then which of the following 24-hour cycles will prevent flowering? 
    A.4 hours light/20 hours dark 
    B.2 hours light/20 hours dark/2 hours light
    C.6 hours light/2 hours dark/light flash/16 hours dark
    D.8 hours light/16 hours dark 
    E.8 hours light/8 hours dark/light flash/8 hours dark 
    E.8 hours light/8 hours dark/light flash/8 hours dark
    (this multiple choice question has been scrambled)
  13. One effect of gibberellins is to stimulate cereal seeds to produce 
    A.starch
    B.abscisic acid 
    C.RuBP carboxylase
    D.amylase 
    E.lipids 
    D.amylase
    (this multiple choice question has been scrambled)
  14. Which of the following hormones would be most useful in promoting the rooting of plant cuttings? 
    A.gibberellins 
    B.oligosaccharins
    C.auxins
    D.abscisic acid
    E.cytokinins 
    C.auxins
    (this multiple choice question has been scrambled)
  15. We know from the experiments of the past that plants bend toward light because 
    A.the sun stimulates stem growth
    B.they need sunlight energy for photosynthesis
    C.auxin is inactive on the dark side of the stem 
    D.phytochrome stimulates florigen production 
    E.cell expansion is greater on the dark side of the stem 
    E.cell expansion is greater on the dark side of the stem
    (this multiple choice question has been scrambled)
  16. A generative cell and a tube cell originate when _____.
    a microspore undergoes mitosis and cytokinesis
  17. As leaf lettuce matures, a tall flowering shoot extends beyond the basal edible leaves. After the plant bolts like this, it no longer produces broad, tasty leaves. Suppose you want to prevent bolting so that you can harvest lettuce longer. You may want to prevent the plant from synthesizing _____.
    gibberellins

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