Key Concepts Quiz
This activity contains 27 questions.
Imagine that a biologist discovers a new species of green algae that has a cuticle-like waxy coating and some rudimentary structures for containing and protecting the gametes. These clues suggest that the new species is very similar to the direct ancestors of the land plants. Where would such a find most likely occur?
in a deep, cold mountain lake with a very stable water level
mats of algae that hang near the ocean's surface, similar to the floating seaweed mats seen in the Sargasso Sea
a lakeshore or marsh with water levels that rise and fall frequently
a deep-sea hydrothermal vent community
a stable, cool, shady spring-fed wetland
Which of the following is the most derived plant adaptation among those listed, and is found only in seed plants?
Which correctly matches a group with an adaptation to life on land that this group pioneered? Refer to the phylogeny as you evaluate the options.
Mosses pioneered lignified vascular tissue.
Angiosperms pioneered flowers.
Flowering plants pioneered apical meristems.
Gymnosperms pioneered xylem and phloem.
A student discovers a mat of green organisms living along the edge of a stream and suspects it is a moss. To confirm that this organism is a moss and not a green alga, he should look for _____.
well-developed vascular tissue containing lignin
an apical meristem and retention of the embryo
alternation of generations
Reproduction of plants differs from reproduction of animals in that _____.
animals produce eggs and sperm, but plants do not
plants have a distinct, multicellular haploid phase
plants only undergo mitosis whereas animals undergo meiosis and mitosis
plants reproduce only by means of spores
The green carpet of moss on the bank of a stream probably consists chiefly of _____.
A common species of liverwort typically resembles a flat green ribbon that occasionally sprouts umbrella-shaped structures. If liverworts and mosses are very similar structurally, then the "ribbons" are _____ and the "umbrellas" are _____.
diploid … haploid
gametophytes … sporophytes
sporophytes … gametophytes
gametangia … sporangia
At one time, many people thought that ferns were magical. How did new fern plants form if there were no seeds? This question was answered with the discovery of _____.
sporangia and spores
In exploring for coal deposits, geologists sometimes look for fossil indicators: fossilized remains of Carboniferous plants. Which of the following combinations in a sample would suggest the presence of rocks that might bear coal beds?
angiosperms and mosses
lycophytes and tree ferns
lycophytes and gymnosperms
mosses and liverworts, but no vascular plants
Unlike mosses and ferns, pines can thrive in arid regions because _____.
they have seeds and pollen
the sporophyte stage is dominant
pines have extensive xylem and phloem
they have lignin
, a common urban shade tree, is a gymnosperm with a life cycle that is like that of the pine. Which of the following would be haploid?
fleshy seed coat
In angiosperms, pollen grains are released from the _____, land on the sticky _____, and develop a tube down the length of the style to the ovules.
filaments … ovary
anthers … sepal
anthers … stigma
carpels … receptacles
Which two features do angiosperms and gymnosperms have in common?
fruits and flowers
seeds and fruits
seeds and pollen
pollen and flowers
Pollen is to sperm as _____ is to _____.
gametophyte … sporophyte
ovary … seed
female gametophyte … egg
seed … gametophyte
A species of tree produces clusters of dense, fleshy red berries. The seeds of this tree are most likely dispersed by _____.
animals that eat the fruits and defecate the seeds
mammals that carry the fruits as hitchhikers on their fur
Which of the following foods are from gymnosperms instead of angiosperms?
walnuts and raspberries
peanuts and grapes
chestnuts and blueberries
pine nuts and juniper berries
Which combination of traits would you expect in the female and male flowers of a wind-pollinated plant?
female: drab with no carpel; male: drab with small anthers
female: showy with small stigma; male: showy and heavily scented with small anthers
female: drab with large sticky stigmas; male: drab with many large anthers
female: drab with large sticky stigmas; male: drab with few, small anthers
Which represents a realistic scenario of sustainable forest management?
All logging will have to stop immediately to allow forests to recover their former health and diversity. At this point the forests can be used for study, tourism, and as a source of medicines.
A range of forest uses, including some timber harvest and forest clearing, will be managed to fit within the slow natural ability of forests to regenerate.
Timber harvest and tree clearing will have to be accelerated to keep up with human demands; forests will regenerate very quickly as long as new fast-growing tree species are planted after cutting.
Forest lands will be replaced by fast-growing crops that produce all of the needed fuel and fiber. Synthetic composites will replace wood lumber, and other products will be invented to fill other human needs.
At one time, many people believed there was a close relationship between plants and fungi. Molecular evidence has now shown that fungi are more closely related to animals than to plants. What characteristic of plants and fungi probably contributed to the early theories of evolutionary relationships?
Both fungi and plants are autotrophs.
Both plants and fungi have cell walls and branching, sessile growth forms.
Both have similar gamete types.
Both plants and fungi can produce flowering bodies.
Yeasts reproduce asexually through _____, and molds reproduce asexually through _____.
budding … cell division
release of spores … heterokaryotes
hyphae … budding
budding … spores
An important drug for organ-transplant patients is derived from a fungus that until recently was placed in the imperfect fungi category. Its classification was changed when a student at Cornell University discovered _____ in the species.
an extensive mycelium
structures associated with sexual reproduction
spore-bearing structures associated with asexual reproduction
Corn smut is a fungal disease of corn. However, some people like to eat the corn smut fungus. Corn smut, like market mushrooms, is a basidiomycete, so it should possess _____.
In basidiomycetes, the equivalent of fertilization occurs _____.
only under perfect conditions
when two hyphae of the same mycelium meet
when spores germinate
during the fusion of two hyphae from different mycelia
Which of the following represents a case of an opportunistic fungal pathogen?
A fungus causes Dutch elm disease in North American and English elms.
Agricultural pests such as smuts and rusts are particularly damaging where crops are genetically uniform.
A common mold called
can cause severe respiratory and systemic infections in people with HIV.
Many people are infected with athlete's foot at some time in their lives.
In which of the following locations would you
expect to find a lichen growing?
on a rock near a waterfall, subjected to occasional splashing
hanging from a tree branch in a dry forest
on a statue in a city known for its polluted air
in the Arctic tundra
Fungi rapidly colonize leaves that fall into freshwater streams. They break down the cellulose in the leaves and absorb the glucose produced. In turn, the fungi serve as food for many insect species that consume the leaf litter—insects that cannot digest cellulose directly. The insects then provide vital food for stream fish. Taken together, these relationships suggest that fungi _____.
harm fish by competing with insects for leaf litter as an energy source
harm fish by poisoning their insect food source
benefit fish by helping insects obtain nutrition from dead leaves
benefit fish by allowing dead leaves to build up on the stream bottom, thus providing nice hiding places
Many people see some fungi as dangerous pathogens or destroyers of crops and food. Which of the following claims concerning the beneficial nature of fungi is true?
We rely on fungi to nourish our crop plants by killing harmful bacteria in the soil.
We have long used yeasts to make antibiotics.
We benefit from smuts, rusts, ergots, and other agriculturally important fungi.
Healthy plants and forests could not be sustained without mycorrhizal fungi and fungal decomposition.
The Clear Answers feature requires scripting to function. Your browser either does not support scripting or you have turned scripting off. So, the Clear Answers feature will not work. Note that you do not need to use the Clear Answers feature in order to use this site. You can change your answers for each question individually.
Copyright © 1995 - 2011
. All rights reserved.
[Return to the Top of this Page]