BSC 2011 Ch 29
The antheridia of mosses produce __________.
sperm
A major division in plant systematics is based on whether a particular species has __________.
vascular tissue
Which of the following is true of the life cycle of bryophytes?
A moist environment is required for sexual reproduction.
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
All of the listed characteristics inhibit decomposition.
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
All of the listed traits of land plants are present in their closest relatives among the algae.
How are gametes produced by bryophytes?
By mitosis of gametophyte cells
During what period did seedless vascular plants form extensive forests of tall trees?
Carboniferous
Evidence suggests that land plants arose from within which protist lineage?
Charophytes
In moving to land, plants had to overcome which of the following challenges?
Desiccation
The tissue called phloem has what function in vascular plants?
Distribution of sugars, amino acids, and other organic products
Which of the following is a genus in the phylum Monilophyta?
Equisetum
Which is a key difference between alternation of generations in plants and sexual reproduction in nonplant organisms?
In plants, the haploid and diploid stages are both multicellular.
The "dots" on the underside of a fern frond are spore cases; therefore, what is true of the plant to which the frond belongs?
It is a sporophyte.
In what way do megasporangia differ from microsporangia?
Megasporangia produce spores that develop into female gametophytes, whereas microsporangia produce spores that develop into male gametophytes.
Where would you find a fern gametophyte?
On moist soil
Which of the following statements about algae and plants is true?
Plants have a waxy, waterproof cuticle, and algae do not.
Sori can be found in which of the following?
Pterophytes
What is advantage is conferred to algae and plants that possess sporopollenin?
Reproductive cells are more resistant to desiccation.
What structures allow plants to readily take up carbon dioxide from the atmosphere?
Stomata
What is the evolutionary significance of megaphylls?
They increase the surface area for photosynthesis.
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
Walled spores produced in sporangia
Alternation of generations in all land plants is between __________.
a multicellular haploid organism and a multicellular diploid organism
The development of the __________ prevents plants from drying out and protects them from microbes.
cuticle
Water is brought into mosses primarily by __________.
diffusion through all cells
Fern gametophytes are __________.
free-living, multicellular organisms
In sporophyte ferns, the leaves are __________.
megaphylls
The gametophyte stage of the plant life cycle is most conspicuous in __________.
mosses
Typically, the upper part of a bryophyte capsule that contains the spores features a ring of interlocking, tooth-like structures known as the __________.
peristome
The embryophytes are __________.
the land plants
To examine meiosis in ferns, you would study __________.
the sporangia