Which of the following is not evidence that charophytes are the closest algal relatives of plants?
answer
the present of chloroplasts
question
Which of the following characteristics of plants is absent in their closest relatives, the charophyte algae?
answer
the alternation of multicellular generations
question
In plants, which of the following are produced by meiosis?
answer
Haploid spores
question
Microphylls are found in which plant group?
answer
lycophytes
question
Select the correct statement about charophytes, a taxon of green algae.
answer
Charophytes and land plants share three distinctive traits
question
Which of these facts provides the best support for the hypothesis that plants evolved from green algae?
answer
The chloroplasts of plants and green algae all have both chlorophyll a and b.
question
Select the correct statement about plant life cycles.
answer
At some point in the life cycle of all plants, the sporophyte is dependent on its gametophyte parent.
question
Select the correct statement contrasting gametophytes and sporophytes.
answer
Sporophytes are diploid, whereas gametophytes are haploid.
question
Select the correct statement about the life cycle of a fern.
answer
Plant gametophytes are haploid multicellular bodies.
question
To what extent does Pleurozium affect nitrogen availability in northern forests of different successional ages?
answer
Pleurozium had little effect in the first 40 years after a fire, but its impact increased over time. In successionally older forests, more nitrogen was added by nitrogen fixation than was deposited from the atmosphere.
question
Suppose an efficient conducting system evolved in a moss that could transport water and other materials as high as a tall tree. Which of the following statements about "trees" of such a species would not be true?
answer
Females could produce only one archegonium.
question
Which term below is the proposed kingdom that would include embryophytes and charophytes?
answer
Steptophyta
question
The closest algal relatives of land plants are _____.
answer
charophytes
question
Which of the following traits was most important in enabling the first plants to move onto land?
answer
the development of sporopollenin to prevent the desiccation of zygotes
The diploid generation of the plant life cycle always _____.
answer
produces spores
question
In seedless plants, a fertilized egg will develop into __________.
answer
a sporophyte that releases haploid spores
question
Most bryophytes, such as mosses, differ from all other plants in that they _____.
answer
lack true leaves and roots
question
In contrast to bryophytes, in vascular plants the dominant stage of the life cycle is the _____.
answer
sporophyte
question
What evolutionary development allowed plants to grow tall?
answer
lignified vascular tissue
question
During the Carboniferous period, forests consisting mainly of _____ produced vast quantities of organic matter, which was buried and later became coal.
answer
ferns and other seedless plants
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