Biology:Concepts and Connections,6e(Campbell)
Chapter33
Control Systems in Plants
Multiple-Choice Questions
1)Which of the following is a health benefit associated with increasing the amount of soybeans in the human diet?
A)decread LDL levels
B)removal of antioxidants fromo the body
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C)decread amount of fiber in the diet
D)incread levels of triglycerides
E)decread HDL levels
Answer:A
Topic:Opening Essay
Skill:Factual Recall
2)Plants grow toward light through the action of
A)enzymes.
B)hormones.
C)nerves.
D)solar energy.
E)chloroplasts.
Answer:B
Topic:33.1
Skill:Factual Recall
3)Grass shoots bend toward the light becau,on the shadowed side,a(n)
A)reduction in auxin levels promotes cell elongation.
B)reduction in gibberellin levels promotes cell elongation.
C)reduction in auxin levels prevents cell elongation.
D)increa in auxin levels promotes cell elongation.
E)increa in auxin levels promotes cell division.
Answer:D
Topic:33.1
Skill:Factual Recallrefrain
4)One of the experiments in phototropism involved cutting off the tips of grass edlings before exposing them to light from one side.The decapitated edlings did not bend toward light.A valid conclusion from this experiment would be that
A)plants cannot engage in photosynthesis without the tip of the plant.
B)light is perceived by the tip of grass plants.
C)a foil cover over the tip of the edlings would cau them to bend.
D)hormones are produced in all parts of the plant.
E)cell elongation caus plants to bend toward light.
Answer:B
Topic:33.1
Skill:Conceptual Understanding
5)Plant hormones
A)must be produced in large quantities to be effective.
B)act on all cells they encounter.
C)usually work independently of each other.
D)are chemical signals that influence growth and development.
E)are rare and produced only in respon to stress.
Answer:D
Topic:33.2
Skill:Factual Recall
6)Which of the following statements about plant hormones is true?
A)Plant hormones are produced in very small concentrations.
B)Plant hormones mainly affect reproductive process.
C)Individual hormones typically have single,specific effects.雅思周末班
D)Plant hormones have little or no effect on plant growth.
E)Plant hormones play a vital role in photosynthesis.
Answer:A
Topic:33.2
Skill:Factual Recall
7)What is the main effect of auxins on plant growth?
A)They reduce growth by inhibiting cell division.
B)They increa growth by promoting cell division and elongation.
C)They increa growth by increasing the rate of photosynthesis.
D)They reduce growth by preventing cell elongation.
E)Auxins have no effect on plant growth.
Answer:B
Topic:33.3
Skill:Factual Recall
8)If the auxin that is produced by an apical meristem is transported in equal amounts down all sides of a twig,the twig will probably
A)elongate evenly.
B)branch near its tip.
C)flower.
D)develop fruit.
E)bend away from the apical meristem.
罗列的意思Answer:A
Topic:33.3
Skill:Conceptual Understanding
9)When a nurry worker pinches off the terminal buds on a young chrysanthemum plant to make it grow bushy,which of the following plant hormones is mainly responsible for growth of side branches?
A)an auxin
B)a gibberellin
C)a cytokinin
D)abscisic acid
E)ethylene
Answer:C
Topic:33.4
Skill:Factual Recall
cooler
10)Which class of hormones produced in the roots of plants promotes cell division and growth, and retards the aging of flowers and leaves?
A)gibberellins
B)phytochromes
C)cytokinins
D)ethylene
E)abscisic acid
Answer:C
Topic:33.4
Skill:Factual Recall
Biology:Concepts and Connections,6e(Campbell)
Chapter36
Population Ecology
Multiple-Choice Questions
1)The decline of the Nile perch in Lake Victoria in east Africa and the reemergence of cichlids is an excellent situation for study by
A)geologists.
B)ecologists.
C)population ecologists.
D)geographers.
E)population geneticists.
Answer:C
Topic:Opening Essay
Skill:Factual Recall
2)A group of individuals of a single species that occupy the same general area defines a
A)population.
B)community.
C)species.
D)subspecies.
E)clone.
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Answer:A
Topic:36.1
Skill:Factual Recall
3)Which of the following is an example of a population?
A)all of the microorganisms on your skin
B)all of the species of cichlid fish in Lake Victoria
C)all of the students in your classroom
D)all students attending colleges and universities in your state
E)the various plants found in prairies in the western United States
Answer:C
Topic:36.1
Skill:Application
4)Assume that there are five alligators per acre in a swamp in northern Florida.This is a measure of the alligator population's
A)dispersion.
B)intrinsic rate of increa.
C)range.
D)equability.
E)density.
Answer:E
Topic:36.2
Skill:Application
5)The pattern of distribution for a certain species of kelp is clumped.We would expect that the pattern of distribution for a population of snails that live on the kelp would be
A)absolute.
B)clumped.
C)homogeneous.
D)random.
E)uniform.
小学生活即将结束Answer:B
Topic:36.2
Skill:Conceptual Understanding
6)You drive through Iowa in the spring and notice that along a stretch of veral kilometers, every third fence post has a male redwing blackbird perched on it defending its nesting territory. This is an example of
A)learned dispersion.
B)clumped dispersion.
C)random dispersion.
D)uniform dispersion.
E)artificial dispersion.
Answer:D
Topic:36.2
Skill:Application
7)The density of Douglas firs in an old-growth forest is estimated by counting the Douglas firs in four sample plots of1hectare each.The number of fir trees in the plots is10,12,7,and11, respectively.What is the estimated density of firs in the forest?
A)2.5trees per hectare
B)5trees per hectare
C)10trees per hectare
D)20trees per hectare
E)25trees per hectare
Answer:C
Topic:36.2
Skill:Application
8)To obtain optimal production in a small garden,one should
A)plant eds in rows with minimal spacing between rows.
makeprogressB)plant eds in clumps with large spaces between clumps.
C)plant eds in a uniform pattern throughout the garden.
D)soak eds overnight before planting in rows.
E)sow eds randomly throughout the garden.
Answer:C
Topic:36.2
Skill:Application
9)A survivorship curve is a
disdainA)graph that plots an individual's likelihood of reproducing as a function of age.
B)graph that plots an individual's likelihood of being alive as a function of age.
C)graph that shows the effect of predation on a prey population.
D)model for population growth that incorporates the concept of carrying capacity.
E)model for population growth that incorporates reproductive rates.
Answer:B
Topic:36.3
Skill:Factual Recall
双语学习10)A Type I survivorship curve is the result of which of the following life history traits?
A)parents providing extended care for their young
B)large numbers of offspring being produced
C)infant mortality being much greater than adult mortality
D)death rates remaining constant over the life span
E)a short life span for most individuals
Answer:A
Topic:36.3
Skill:Conceptual Understanding
Biology:Concepts and Connections,6e(Campbell)
Chapter37
Communities and Ecosystems
Multiple-Choice Questions
1)A hippopotamus produces a significant amount of waste(dung)that nourishes a variety of life forms;this would not be possible if it were not for
A)carp that scrape the skin of hippos for dead skin,parasites,and algae.
B)an internal community of microorganisms that helps metabolize ingested plant material.
C)the anatomy of the hippo's stomach.
D)cichlids that clean the tail bristles of the hippo.
