Organisms and Population Test

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Organisms and Population Test - 4

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Question 1
4 / -1

Population is a group of individuals of a single species living in a given area. It includes spatial arrangement, genetic variation and the dynamics including natality, mortality, biotic potential, carrying capacity, etc. Population structure includes features as density, abundance, spacing, genetic variations. The genetic structure reveals genetic variations and population size.
Q. ______ is the study of the ecology of population.

A
A. Autocology

B
B. Demecology

C
C. Endaphology

D
D. None of the above

Solution

Autocology is the study of species ecology and Edaphology is the study of soil.
Question 2
4 / -1

Population is a group of individuals of a single species living in a given area. It includes spatial arrangement, genetic variation and the dynamics including natality, mortality, biotic potential, carrying capacity, etc. Population structure includes features as density, abundance, spacing, genetic variations. The genetic structure reveals genetic variations and population size.
Q. Which Indian state has the least population growth?

A
A. Kerala

B
B. U.P.

C
C. Assam

D
D. A.P

Solution

Kerala has the least population growth, which has the highest population growth.
Question 3
4 / -1

Population is a group of individuals of a single species living in a given area. It includes spatial arrangement, genetic variation and the dynamics including natality, mortality, biotic potential, carrying capacity, etc. Population structure includes features as density, abundance, spacing, genetic variations. The genetic structure reveals genetic variations and population size.
Q. ______ species inhabit different geographical areas.

A
A. Sympatic

B
B. Allopatric

C
C. Both (A) and (B)

D
D. None of these

Solution

Allopatric is the evolving of separate species from an ancestral population.
Question 4
4 / -1

Population is a group of individuals of a single species living in a given area. It includes spatial arrangement, genetic variation and the dynamics including natality, mortality, biotic potential, carrying capacity, etc. Population structure includes features as density, abundance, spacing, genetic variations. The genetic structure reveals genetic variations and population size.
Q. There is more competition for survival between :

A
A. Different animals of same niche

B
B. Same animals of same niche

C
C. Different animals of different niche

D
D. Same animals of different niches.

Solution

Same animals under the niche have limited food resources. So, the same animals would have the same food habits and there is more competition for survival.
Question 5
4 / -1

Population is a group of individuals of a single species living in a given area. It includes spatial arrangement, genetic variation and the dynamics including natality, mortality, biotic potential, carrying capacity, etc. Population structure includes features as density, abundance, spacing, genetic variations. The genetic structure reveals genetic variations and population size.
Q. Increase in population does not increase in :

A
A. Health facilities

B
B. Unemployment

C
C. Per capita income.

D
D. Food resources

Solution

Unemployment is the unavailability of suitable jobs that can be overcome by developing skill in creating opportunity. So, it is not impacted by an increase in population.
Question 6
4 / -1

Read the following text and answer the following question on the basis of the same :
All biomes of the earth constitute the earth's ecosystem. All flora and fauna occur in the lithosphere, atmosphere and hydrosphere along with their environments. Air, water, soil, biota, temperature and light are the major environmental factors that directly affect the flora and fauna in different geological areas of the earth.
Q. Climate of an area depends upon :

A
A. Altitude of the area

B
B. Latitude of the area

C
C. Topography

D
D. Both (A) and (B).

Solution

The altitude of an area can impact climates that are mostly rainy and have low temperature while the altitude of an area impacts the ultimate with respect to equator and poles.
Question 7
4 / -1

Read the following text and answer the following question on the basis of the same :
All biomes of the earth constitute the earth's ecosystem. All flora and fauna occur in the lithosphere, atmosphere and hydrosphere along with their environments. Air, water, soil, biota, temperature and light are the major environmental factors that directly affect the flora and fauna in different geological areas of the earth.
Q. Edaphology is concerned with study of :

A
A. Soil

B
B. Climate

C
C. Biota

D
D. Topography

Solution

Edaphology is the study of soil useful for plant growth.
Question 8
4 / -1

Read the following text and answer the following question on the basis of the same :
All biomes of the earth constitute the earth's ecosystem. All flora and fauna occur in the lithosphere, atmosphere and hydrosphere along with their environments. Air, water, soil, biota, temperature and light are the major environmental factors that directly affect the flora and fauna in different geological areas of the earth.
Q. Hydrological cycle is concerned with :

A
A. Lithosphere

B
B. Hydrosphere

C
C. Atmosphere

D
D. All of these.

Solution

Lithosphere is concerned with land, hydrosphere with water bodies and atmosphere is concerned with space. Hydrological cycle circulates in all these three subsystems.
Question 9
4 / -1

Read the following text and answer the following question on the basis of the same :
All biomes of the earth constitute the earth's ecosystem. All flora and fauna occur in the lithosphere, atmosphere and hydrosphere along with their environments. Air, water, soil, biota, temperature and light are the major environmental factors that directly affect the flora and fauna in different geological areas of the earth.
Directions : In the following questions a statement of Assertion (A) is followed by a statement of reason (R). Mark the correct choice as :
Assertion (A) : Some organisms like Salmon are known as Euryhaline.
Reason (R) : Euryhaline can tolerate a wide range of salinities.

A
A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B
B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C
C. Assertion (A) is true but reason (R) is false.

D
D. Assertion (A) is false but reason (R) is true.

Solution

Euryhaline animals like salmon can adopt a wide range of salinity as they are found in areas where rivers and sea meet.
Question 10
4 / -1

Read the following text and answer the following question on the basis of the same :
All biomes of the earth constitute the earth's ecosystem. All flora and fauna occur in the lithosphere, atmosphere and hydrosphere along with their environments. Air, water, soil, biota, temperature and light are the major environmental factors that directly affect the flora and fauna in different geological areas of the earth.
Q. Soil aeration is inversely proportional to :

A
A. Soil pore spaces

B
B. Diameter of soil particles

C
C. Water holding capacity of soil

D
D. None of the above.

Solution

More will be the water holding capacity soil, less will be the air spaces less soil aeration.
Question 11
4 / -1

Read the following text and answer the following question on the basis of the same:
Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Q. Identify the incorrect statement:

A
A. Exponential growth occurs in organisms such as lemmings.

B
B. Logistic growth is more realistic.

C
C. Exponential growth has two phases: lag and log.

D
D. In logistic growth, population passes well beyond the carrying capacity of the ecosystem.

Solution

In logistic growth the population seldom grows beyond the carrying capacity of the ecosystem.
Question 12
4 / -1

Read the following text and answer the following question on the basis of the same:
Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Q. The population growth is generally described by the following equation:
dN/dt = rN(K-N)/K
What does 'r' represent in the given equation?

A
A. Population density at time Y

B
B. Intrinsic rate of natural increase

C
C. Carrying capacity

D
D. The base of natural logarithm

Solution

'r' represents Intrinsic rate of natural increase.
Question 13
4 / -1

Read the following text and answer the following question on the basis of the same:
Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Q. Identify the correct equation that represents the exponential population growth curve:

A
dN/dt = IN

B
Both (A) and (C)

C
N_t =N₀e^rt

D
dN/dt = rN

Solution

At the constant birth rate in population through time and is never limited by food or disease, known as exponential growth.
The formula of exponential growth is dNdt=rNdNdt=rN where dNdtdNdt is the rate of change in population size, r is the biotic potential and N is the population size.
Question 14
4 / -1

Read the following text and answer the following question on the basis of the same:
Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Q. Study the population growth curves (A and B) in the given graph and select the incorrect statement:

A
Curve 'A' shows exponential growth, represented by equation dN/dt=rN

B
Curve 'B' shows logistic growth, represented by equation dN/dt = r(K-N)/K

C
Exponential growth curve is considered as more realistic than the logistic growth curve

D
Curve 'A' can also be represented by equation N_t = N₀e^rt

Solution

Since resources of growth for most animal populations are finite and become limiting sooner or later, the logistic growth model is considered as more realistic.
Question 15
4 / -1

Read the following text and answer the following question on the basis of the same:
Growth of a population with time shows specific and predictable patterns. Two types of growth pattern of population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in exponential fashion. When the resources are limited the growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Q. The equations correctly represents Verhulst-Pearl logistic growth is:

A
A. dN/dt = rN(K-N)/K

B
B. dN/dt = rN/K

C
C. dN/dt = N(K-N)/K

D
D. dN/dt = r(K-N)/K

Solution

S-shaped growth curve is also called Verhulst-Pearl logistic curve and is represented by the following equation.
where dt/dN = rate of change in population size, r = intrinsic rate of natural increase, N = population density, K= carrying
capacity and = environmental resistance.

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Organisms and Population Test - 4

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Organisms and Population Test - 4

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Question 1

A. Autocology

B. Demecology

C. Endaphology

D. None of the above

Solution

Question 2

A. Kerala

B. U.P.

C. Assam

D. A.P

Solution

Question 3

A. Sympatic

B. Allopatric

C. Both (A) and (B)

D. None of these

Solution

Question 4

A. Different animals of same niche

B. Same animals of same niche

C. Different animals of different niche

D. Same animals of different niches.

Solution

Question 5

A. Health facilities

B. Unemployment

C. Per capita income.

D. Food resources

Solution

Question 6

A. Altitude of the area

B. Latitude of the area

C. Topography

D. Both (A) and (B).

Solution

Question 7

A. Soil

B. Climate

C. Biota

D. Topography

Solution

Question 8

A. Lithosphere

B. Hydrosphere

C. Atmosphere

D. All of these.

Solution

Question 9

A. Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).

B. Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).

C. Assertion (A) is true but reason (R) is false.

D. Assertion (A) is false but reason (R) is true.

Solution

Question 10

A. Soil pore spaces

B. Diameter of soil particles

C. Water holding capacity of soil

D. None of the above.

Solution

Question 11

A. Exponential growth occurs in organisms such as lemmings.

B. Logistic growth is more realistic.

C. Exponential growth has two phases: lag and log.

D. In logistic growth, population passes well beyond the carrying capacity of the ecosystem.

Solution

Question 12

A. Population density at time Y

B. Intrinsic rate of natural increase

C. Carrying capacity

D. The base of natural logarithm

Solution

N_t =N₀e^rt

Curve 'A' can also be represented by equation N_t = N₀e^rt