Biogeochemical cycling ensures that

many nutrients will not reach toxic concentrations in the biosphere.

human activity will have no effect on elements, chemical

c compounds, and other forms of matter. living organisms will not become limited in any one nutrient. nutrients will be circulated throughout the biosphere.

nutrients will be circulated throughout the biosphere.

many nutrients will not reach toxic concentrations in the biosphere.

Which of the following descriptions about the organization of an ecosystem is correct?

Communities make up species, which make up populations.

Populations make up species, which make up communities.

Species make up communities, which make up populations.

Species make up populations, which make up communities.

The movements of energy and nutrients through living systems are different because

energy is limited in the biosphere and nutrients are always available.

energy flows in one direction and nutrients recycle.

energy is limited in the biosphere and nutrients are always available.

nutrients flow in one direction and energy recycles.

energy forms chemical compounds and nutrients are lost as heat.

The trophic levels in Figure 3 2 illustrate

that the producers outnumber first-level consumers.

the relative amount of energy at each level.

the amount of living organic matter at each level.

the relative number of individual organisms at each level.

that the producers outnumber first-level consumers.

Most of the energy available to a consumer trophic level is used by organisms for

producing inorganic chemical compounds.

transfer to the next trophic level.

respiration, movement, and reproduction.

producing inorganic chemical compounds.

Matter can recycle through the biosphere because

biological systems use only carbon, oxygen, hydrogen, and nitrogen.

matter is passed out of the body as waste.

matter is assembled into chemical compounds.

biological systems do not use up matter, they transform it.

biological systems use only carbon, oxygen, hydrogen, and nitrogen.

Carbon cycles through the biosphere in all of the following processes EXCEPT

decomposition of plants and animals.

How is carbon stored in the biosphere?

in the atmosphere as carbon dioxide

underground as fossil fuels and calcium carbonate rock

in the oceans as dissolved carbon dioxide

27 + Mcqs in The Biosphere in Uncategorized topics Page 1 McqOptions

1.	Biogeochemical cycling ensures that
A.	human activity will have no effect on elements, chemical
B.	c compounds, and other forms of matter. living organisms will not become limited in any one nutrient. nutrients will be circulated throughout the biosphere.
C.	nutrients will be circulated throughout the biosphere.
D.	many nutrients will not reach toxic concentrations in the biosphere.
Answer» D. many nutrients will not reach toxic concentrations in the biosphere.

Discussion

2.	The combined portions of Earth in which all living things exist is called the
A.	biome.
B.	community.
C.	ecosystem.
D.	biosphere.
Answer» E.

Discussion

3.	The branch of biology dealing with interactions among organisms and between organisms and their environment is called
A.	economy.
B.	modeling.
C.	recycling.
D.	ecology.
Answer» E.

Discussion

4.	Which of the following descriptions about the organization of an ecosystem is correct?
A.	Communities make up species, which make up populations.
B.	Populations make up species, which make up communities.
C.	Species make up communities, which make up populations.
D.	Species make up populations, which make up communities.
Answer» E.

Discussion

5.	The simplest grouping of more than one kind of organism in the biosphere is
A.	a population.
B.	a community.
C.	an ecosystem.
D.	a species.
Answer» C. an ecosystem.

Discussion

6.	Plants are
A.	producers.
B.	consumers.
C.	herbivores.
D.	omnivores.
Answer» B. consumers.

Discussion

7.	An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)
A.	heterotroph.
B.	consumer.
C.	detritivore.
D.	autotroph.
Answer» E.

Discussion

8.	What is the original source of almost all the energy in most ecosystems?
A.	carbohydrates
B.	sunlight
C.	water
D.	carbon
Answer» C. water

Discussion

9.	An organism that cannot make its own food is called a(an)
A.	heterotroph.
B.	chemotroph.
C.	autotroph.
D.	producer.
Answer» B. chemotroph.

Discussion

10.	Organisms that obtain nutrients by breaking down dead and decaying plants and animals are called
A.	decomposers.
B.	omnivores.
C.	autotrophs.
D.	producers.
Answer» B. omnivores.

Discussion

11.	The total amount of living tissue within a given trophic level is called the
A.	organic mass.
B.	trophic mass.
C.	energy mass.
D.	biomass.
Answer» E.

Discussion

12.	All the interconnected feeding relationships in an ecosystem make up a food
A.	interaction.
B.	chain.
C.	network.
D.	web.
Answer» E.

Discussion

13.	What is an organism that feeds only on plants called?
A.	carnivore
B.	herbivore
C.	omnivore
D.	detritivore
Answer» C. omnivore

Discussion

14.	A bird stalks, kills, and then eats an insect. Based on its behavior, which ecological terms describe the bird?
A.	herbivore, decomposer
B.	producer, heterotroph
C.	carnivore, consumer
D.	autotroph, herbivore
Answer» D. autotroph, herbivore

Discussion

15.	What is an ecological model of the relationships that form a network of complex interactions among organisms in a community from producers to decomposers?
A.	food web
B.	an ecosystem
C.	food chain
D.	a population
Answer» B. an ecosystem

Discussion

16.	What is the term for each step in the transfer of energy and matter within a food web?
A.	energy path
B.	food chain
C.	trophic level
D.	food pyramid
Answer» D. food pyramid

Discussion

17.	The movements of energy and nutrients through living systems are different because
A.	energy flows in one direction and nutrients recycle.
B.	energy is limited in the biosphere and nutrients are always available.
C.	nutrients flow in one direction and energy recycles.
D.	energy forms chemical compounds and nutrients are lost as heat.
Answer» B. energy is limited in the biosphere and nutrients are always available.

Discussion

18.	A snake that eats a frog that has eaten an insect that fed on a plant is a
A.	first-level producer.
B.	first-level consumer.
C.	second-level producer.
D.	third-level consumer.
Answer» E.

Discussion

19.	The trophic levels in Figure 3 2 illustrate
A.	the relative amount of energy at each level.
B.	the amount of living organic matter at each level.
C.	the relative number of individual organisms at each level.
D.	that the producers outnumber first-level consumers.
Answer» D. that the producers outnumber first-level consumers.

Discussion

20.	Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism s life processes, and the rest is
A.	used in reproduction.
B.	stored as body tissue.
C.	stored as fat.
D.	eliminated as heat.
Answer» E.

Discussion

21.	Most of the energy available to a consumer trophic level is used by organisms for
A.	transfer to the next trophic level.
B.	respiration, movement, and reproduction.
C.	producing inorganic chemical compounds.
D.	performing photosynthesis.
Answer» C. producing inorganic chemical compounds.

Discussion

22.	Matter can recycle through the biosphere because
A.	matter is passed out of the body as waste.
B.	matter is assembled into chemical compounds.
C.	biological systems do not use up matter, they transform it.
D.	biological systems use only carbon, oxygen, hydrogen, and nitrogen.
Answer» D. biological systems use only carbon, oxygen, hydrogen, and nitrogen.

Discussion

23.	Which type of pyramid shows the amount of living tissue at each trophic level in an ecosystem?
A.	a numbers pyramid
B.	an energy pyramid
C.	a biomass pyramid
D.	a food pyramid
Answer» D. a food pyramid

Discussion

24.	The repeated movement of water between Earth s surface and the atmosphere is called
A.	the water cycle.
B.	the condensation cycle.
C.	precipitation.
D.	evaporation.
Answer» B. the condensation cycle.

Discussion

25.	Carbon cycles through the biosphere in all of the following processes EXCEPT
A.	photosynthesis.
B.	transpiration.
C.	burning of fossil fuels.
D.	decomposition of plants and animals.
Answer» C. burning of fossil fuels.

Discussion

26.	How is carbon stored in the biosphere?
A.	in the atmosphere as carbon dioxide
B.	underground as fossil fuels and calcium carbonate rock
C.	in the oceans as dissolved carbon dioxide
D.	all of the above
Answer» E.

Discussion

27.	Which of the following has a direct role in the nitrogen cycle?
A.	bacteria
B.	legumes
C.	decomposers
D.	all of the above
Answer» E.

Discussion

Explore topic-wise MCQs in Uncategorized topics.

Biogeochemical cycling ensures that

The combined portions of Earth in which all living things exist is called the

The branch of biology dealing with interactions among organisms and between organisms and their environment is called

Which of the following descriptions about the organization of an ecosystem is correct?

The simplest grouping of more than one kind of organism in the biosphere is

Plants are

An organism that uses energy to produce its own food supply from inorganic compounds is called a(an)

What is the original source of almost all the energy in most ecosystems?

An organism that cannot make its own food is called a(an)

Organisms that obtain nutrients by breaking down dead and decaying plants and animals are called

The total amount of living tissue within a given trophic level is called the

All the interconnected feeding relationships in an ecosystem make up a food

What is an organism that feeds only on plants called?

A bird stalks, kills, and then eats an insect. Based on its behavior, which ecological terms describe the bird?

What is an ecological model of the relationships that form a network of complex interactions among organisms in a community from producers to decomposers?

What is the term for each step in the transfer of energy and matter within a food web?

The movements of energy and nutrients through living systems are different because

A snake that eats a frog that has eaten an insect that fed on a plant is a

The trophic levels in Figure 3 2 illustrate

Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is used for the organism s life processes, and the rest is

Most of the energy available to a consumer trophic level is used by organisms for

Matter can recycle through the biosphere because

Which type of pyramid shows the amount of living tissue at each trophic level in an ecosystem?

The repeated movement of water between Earth s surface and the atmosphere is called

Carbon cycles through the biosphere in all of the following processes EXCEPT

How is carbon stored in the biosphere?

Which of the following has a direct role in the nitrogen cycle?