BSC 2011 Ch 29

24 July 2022
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question
What is the evolutionary significance of megaphylls?
answer
They increase the surface area for photosynthesis.
question
Evidence suggests that land plants arose from within which protist lineage?
answer
Charophytes
question
What characteristic of Sphagnum peatlands is responsible for their ability to inhibit decomposition? Low oxygen Low pH All of the listed characteristics inhibit decomposition. Low temperature Phenolic compounds produced by Sphagnum
answer
All of the listed characteristics inhibit decomposition.
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Which of the following is a trait unique to land plants? Multicellular structures for carrying out photosynthesis Chloroplasts Walled spores produced in sporangia All the listed traits are unique to land plants. Cellulose
answer
Walled spores produced in sporangia
question
In sporophyte ferns, the leaves are __________.
answer
megaphylls
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The gametophyte stage of the plant life cycle is most conspicuous in __________.
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mosses
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What structures allow plants to readily take up carbon dioxide from the atmosphere?
answer
Stomata
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During what period did seedless vascular plants form extensive forests of tall trees?
answer
Carboniferous
question
Sori can be found in which of the following?
answer
Pterophytes
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How are gametes produced by bryophytes?
answer
By mitosis of gametophyte cells
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To examine meiosis in ferns, you would study __________.
answer
the sporangia
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Water is brought into mosses primarily by __________.
answer
diffusion through all cells
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In what way do megasporangia differ from microsporangia?
answer
Megasporangia produce spores that develop into female gametophytes, whereas microsporangia produce spores that develop into male gametophytes.
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Typically, the upper part of a bryophyte capsule that contains the spores features a ring of interlocking, tooth-like structures known as the __________.
answer
peristome
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The antheridia of mosses produce __________.
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sperm
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Alternation of generations in all land plants is between __________.
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a multicellular haploid organism and a multicellular diploid organism
question
In moving to land, plants had to overcome which of the following challenges?
answer
Desiccation
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Where would you find a fern gametophyte?
answer
On moist soil
question
Which of the following is a genus in the phylum Monilophyta?
answer
Equisetum
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The "dots" on the underside of a fern frond are spore cases; therefore, what is true of the plant to which the frond belongs?
answer
It is a sporophyte.
question
The tissue called phloem has what function in vascular plants?
answer
Distribution of sugars, amino acids, and other organic products
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Fern gametophytes are __________.
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free-living, multicellular organisms
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The development of the __________ prevents plants from drying out and protects them from microbes.
answer
cuticle
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Which of the following is true of the life cycle of bryophytes?
answer
A moist environment is required for sexual reproduction.
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The embryophytes are __________.
answer
the land plants
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A major division in plant systematics is based on whether a particular species has __________.
answer
vascular tissue
question
Which of the following statements about algae and plants is true?
answer
Plants have a waxy, waterproof cuticle, and algae do not.
question
Which is a key difference between alternation of generations in plants and sexual reproduction in nonplant organisms?
answer
In plants, the haploid and diploid stages are both multicellular.
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What is advantage is conferred to algae and plants that possess sporopollenin?
answer
Reproductive cells are more resistant to desiccation.
question
Which of the following are traits shared by land plants and their closest relatives among the algae? All the listed traits evolved exclusively in land plants. Formation of a phragmoplast All of the listed traits of land plants are present in their closest relatives among the algae. Rings of cellulose-synthesizing proteins in the plasma membrane Structure of flagellated sperm
answer
All of the listed traits of land plants are present in their closest relatives among the algae.