Chapter:

70+ Organism and Population Solved MCQs

in Biology

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: All India Pre Medical Test (AIPMT) .

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1.	What is true for the following statements ? Statement X : Migration of birds is influenced by light. Statement Y : Reproduction of birds is influenced by light. Statement Z : In all birds gonads are activated due to increase in intensity of light during summer. X Y Z
A.	True False False
B.	False True False
C.	True True True
D.	True True False
Answer» A. True False False

discuss ⁽¹⁾

2.	What is true for the given statements ? Statement X : Birds and Mammals obtain greater body size in cold region than in warm regions. Statement Y : Birds and Mammals are Homeothermic (warm blooded)animals. Statement Z : Reptiles are smaller in cold region.
A.	True False True
B.	True True False
C.	True True True
D.	False True True
Answer» D. False True True

discuss

3.	“Spiny lizard” absorbs water from the atmosphere which is appropriate similar functional option for the statement ?
A.	Tongue of Human
B.	Hygroscpic roots of orchid
C.	Roots of plants
D.	None of these
Answer» B. Hygroscpic roots of orchid

discuss

4.	What is true for the following statements ? Statement X : Marine fishes have chlorine secretory cells. while riverine fishes have chlorine cells. Statement Y : Compared to marine water, fluid present in fish is hypotonic while reverine water is hypertonic compared to fluid present in fish. X Y X Y
A.	True True
B.	False False
C.	True False
D.	False True
Answer» C. True False

discuss

5.	Which animal is capable of obtaining water by oxidation of lipid.
A.	Rat
B.	Earthworm
C.	Mole
D.	Kangaroo rat
Answer» D. Kangaroo rat

discuss

6.	Which is the example of intraspecific competition for food ?
A.	Barnacle on rocks of the submerged water
B.	Two female dogs and two male dogs
C.	Various types of lichens
D.	Paramaecium caudatuns and P.aurelia in laboratory.
Answer» B. Two female dogs and two male dogs

discuss

7.	Name the animals with freshwater habit in which (i) endosmosis is possible (ii) Excess water in removed by green glands (iii) Greenglands removes water in the from of urine
A.	Fresh water fishe
B.	ophiocephalus
C.	Crustacean astucus
D.	None of these
Answer» C. Crustacean astucus

discuss

8.	In snakes realised (actual) natality is less than potential natality; because.....
A.	all the eggs are not incubated
B.	enviornmental boomrang (resistance)
C.	Though eggs are incubated they donot reach upto adult stage.
D.	All of these.
Answer» D. All of these.

discuss

9.	Indentify me “ My functioning is like an orchid.
A.	Protopteru
B.	Spiny lizard
C.	uromastrix
D.	Spiny platypus
Answer» B. Spiny lizard

discuss

10.	Crustacian Astacus = Green land Marine turtle what is ‘X’ accroding to the information given ?
A.	Salt gland
B.	Kidney
C.	None of these
D.	chlorine secretory cells
Answer» B. Kidney

discuss

11.	Which of the following is correct statement ?
A.	uromatrix lizard stores water in the intestine
B.	Camel stores water in its stomach
C.	Anabus develops accesary respiratory organs to respire in water.
D.	Kangaroo rat undegeoes hibernation.
Answer» C. Anabus develops accesary respiratory organs to respire in water.

discuss

12.	Parasitic animal which is part of bio-geo community and included as zoo planktons and mesofauna of tenestrial ecosystem is ....
A.	Mole
B.	mites
C.	Earthworms
D.	leech
Answer» B. mites

discuss

13.	From the given option which is the appropriate for ecto parasite animal Ascaris, Tapeworm, plas modium, mites
A.	phytoplankton
B.	mesofauna
C.	macrofauna
D.	phytoplanktons and mesofauna.
Answer» C. macrofauna

discuss

14.	Which living organism is seen in the hot water spring having temperature more than 100 C ..
A.	Methanogen
B.	Thermoacidophils
C.	Helophytes
D.	spirokit
Answer» B. Thermoacidophils

discuss

15.	Find out population density. Since last 4 years number of lions in a squre forest is 500 (length of forest =10 km)
A.	1.25 lions/year . 2k meter
B.	12.5 lions/ k meter2 - year
C.	1.025 lions/ cm2 month
D.	12.5 lions/ k meter2 - month
Answer» A. 1.25 lions/year . 2k meter

discuss

16.	Average human population in a certain time area is 5000 in which 1111 children are produced during an years, find out the birth rate ?
A.	0.1111
B.	0.3333
C.	0.2222
D.	0.4444
Answer» C. 0.2222

discuss

17.	In birthrate and deathrate is equal, then what will be the Vital Index ?
A.	= 1
B.	= 100
C.	>100
D.	<100
Answer» B. = 100

discuss

18.	Which option is correct for the given statement . Statement X : Density dependent factors are intrinsic Reason R : They are generated in population only
A.	Both statement are true
B.	Both statement are false
C.	X is true, y is false
D.	X is false, Y is true
Answer» A. Both statement are true

discuss

19.	In a population of frog ‘J’ type of population growth curve is seen than which information from the given graph can be true for “ point A” (i) Vital Index < 100 (ii) Birth rate < death rate (iii) Birht rate > death rate
A.	I
B.	II, III
C.	I, III
D.	I, II
Answer» D. I, II

discuss

20.	The given graph shows seasonal changes in the population of Birds of Gujarat in the year 2002. In the given graph what is true for point X ?
A.	Vital Index <100
B.	Vital Index >100
C.	Vital Index =100
D.	None of these
Answer» D. None of these

discuss

21.	Producers --->Decomposers ---->’X’, then what will be ‘X’ ?
A.	Nostoc
B.	Fungi
C.	Both of these
D.	None of these
Answer» D. None of these

discuss

22.	In given chart,what is the problem seen in living organism staying in‘X’ denoted area ?
A.	endosmosis
B.	exosmsis
C.	a & b both
D.	geting water and maintaing it.
Answer» C. a & b both

discuss

23.	What is correct for the given statement ? Statement P : Environmental study is linked with ecology StatementQ : Ecology is included in environmental study.
A.	Both statement are true
B.	Both statement are wrong
C.	P is right and Q is wrong
D.	P is wrong and Q is right
Answer» A. Both statement are true

discuss

24.	What is the vital Index, if Birht rate is 0 and Death rate = 5 ?
A.	0
B.	100
C.	1
D.	None of these
Answer» A. 0

discuss

25.	If the Birth rate is 10 and death rate is 0 then what is VITAL INDEX ?
A.	0
B.	100
C.	Infinative
D.	1
Answer» C. Infinative

discuss

26.	Which is appropriate for the following statement ? Statement X : Pacific salmon fish reproduces only once in its life time. Statement Y : In a reproductive season it lays 2,80,000,000 eggs. X Y
A.	True True
B.	False False
C.	True False
D.	False True
Answer» C. True False

discuss

27.	Mycobiont Supplies X to phycobiont and phycobiont supplies Y to mycobiont, then what is true for X and Y ?
A.	X : Mineral element ; Y : Habitat
B.	X : organic nutrients ; Y : Inorganic Nutrient
C.	X : Habitat Y : protection
D.	X : Minerals Y : organic nutrients
Answer» D. X : Minerals Y : organic nutrients

discuss

28.	In a population of salmon fish, potential Natality is 10,000 while realised mortality is 200, then the Vitlal Index =
A.	50,
B.	less then 50
C.	mor then 50
D.	None of these
Answer» B. less then 50

discuss

29.	Which of the following is not possible in ecosystem where microflora is absent
A.	Photosynthesi
B.	Decomposition
C.	Assimillation
D.	None of these
Answer» D. None of these

discuss

30.	If marine fish is kept in fresh water, will it survive
A.	Yes, If chlorine cells are placed in its kidney
B.	Yes, If chlorine cells are placed in its green gland
C.	No, Because it can not adapt
D.	No, they can not survive but of yongones hatching out of their eggs can survive
Answer» C. No, Because it can not adapt

discuss

31.	What is true for both the organism showing interspecific compitition ?
A.	Both are benefited
B.	more or less harmful effect to both
C.	one is benefited where as other is at loss
D.	None of these
Answer» B. more or less harmful effect to both

discuss

32.	If at “t” time population density is N, then what is the equation for the population density at (t+1) time ?
A.	N (t+1) = Nt - [CD+E] - [B+I)]
B.	N (t+1) = Nt+B+I-D-E
C.	N (t+1) = Nt+(B+I)-(D+ E)]
D.	All of these
Answer» D. All of these

discuss

33.	Write appropriate option for antibiosis
A.	Penicillium fungi and certan gram +ve bacteria
B.	Penicillium fungi and certan gram -ve bacteria
C.	Spirocheate and fermicutes
D.	None of these
Answer» A. Penicillium fungi and certan gram +ve bacteria

discuss

34.	In which subdivision of aquatic ecosystem thermal stratification in seen ?
A.	marine
B.	deep fresh water habitat
C.	marine and fresh water are
D.	None of these
Answer» B. deep fresh water habitat

discuss

35.	In which of the following aquatic ecosystems habitat fluid (liquid) is very concetrated compared to body fluid ?
A.	Marine
B.	Esturine
C.	Riverine
D.	pond.
Answer» A. Marine

discuss

36.	Which of the following is true with reference to temperature diffrence ?
A.	1. Terrestrial Habital > Aquatic Habitat 2. Sea < Deep fresh water lakes
B.	1. Aquatic Habitat > Terrestrial Habitat 2. Sea < Deep fresh water lake
C.	1. Terrestrial Habital = Aquatic Habitat 2. Sea < Deep fresh water lake
D.	1. Terrestrial Habital < Aquatic Habital 2. Sea = Deep fresh water lake
Answer» A. 1. Terrestrial Habital > Aquatic Habitat 2. Sea < Deep fresh water lakes

discuss

37.	Water holding capacity of land depends on ?
A.	Soil composition
B.	Grain size
C.	Aggregation of grain
D.	All of these
Answer» D. All of these

discuss

38.	What true for the following statements ? Statement X : During evolution many species, by continous development of their internal environment, made their physiologycal processes more efficient. Statement Y : Orgenisms show adaptations in order to survive in the enviornment X Y X Y
A.	True True
B.	False True
C.	True False
D.	False False
Answer» A. True True

discuss

39.	In which of the following organism water is stored in its transformed from and not water as such ?
A.	camel
B.	Uromatrix
C.	Spiny tailed lizard
D.	rat
Answer» A. camel

discuss

40.	Which path is followed by plants as a part of adaptation in an ecosystem where Kangaroo rat is living ?
A.	C3 Path
B.	C4 Path
C.	CAM Path
D.	TCA Path
Answer» C. CAM Path

discuss

41.	Which is true for the following statements ? Statement X : Cursorial animals have spindle shaped body Statement Y : Because of narrow head they can prepare burrow properly X Y
A.	True False
B.	False True
C.	False False
D.	True True
Answer» D. True True

discuss

42.	What is the temperature at which archeobacteria can survive ?
A.	90 C
B.	100 C
C.	110 C
D.	All of these
Answer» D. All of these

discuss

43.	To whom can we correlate the young one developing from the eggs of Daphnis which are laid at normal room temperature ? (i) queen bee (ii) worker bee (iii) male (drone) bee
A.	i, ii
B.	i, iii
C.	ii, iii
D.	i, ii,iii)
Answer» A. i, ii

discuss

44.	Which is appropriate option if we take ‘T’ for correct statement and’F’ for wrong statement ? (i) Energy pyramids are always upright. (ii) Detritus food chain begins with dead organic matter (iii) C4 path is the only path seen in xerophytes (iv) Biodiversity is less in equatorial region because of more sunlight (v) At normal Temperature daphnis lays parthenogenetic eggs. which develops into male(0 )
A.	TFTTF
B.	TFFFF
C.	FFFTF
D.	TFTFF
Answer» B. TFFFF

discuss

45.	Increase and decrease in a population in one of the places in USA, because of sandy cyclone is given below. Which type of graph is possible for total no. of individuals in a population v/s month ? Month Birth rate Imigration Death Emigration July 40 100 30 20 August 100 200 50 45 September 200 800 100 10 October 100 -- 5000 3000
A.	S. Shaped
B.	J. Shaped
C.	irrupative
D.	None of these
Answer» B. J. Shaped

discuss

46.	Hygroscopic skin is seen in.....
A.	Kangaroo rat
B.	Uromatrix
C.	Spiny tailed lizard
D.	Camel
Answer» C. Spiny tailed lizard

discuss

47.	What is true for marine animals ?
A.	Because of exosmosis they drink sea water
B.	As they drink sea water exosmosis occurs
C.	Because of exosmosis body fluid become hypotonic, so they drink sea water
D.	None of these
Answer» A. Because of exosmosis they drink sea water

discuss

48.	In order to find out VITAL INDEX in Rampur Village, following information was gathered Death Rate = 1/x Birth Rate = z Average population = 1/y What is the Vital Index ?
A.	xyz X 100
B.	z/xy =100
C.	xy/z X 100
D.	100/xyz
Answer» A. xyz X 100

discuss

49.	What is the true for the community ecology diagram ?
A.	Involvement of 4 individuls of a population
B.	Involvement of 4 population of a species
C.	Involvement of 4 species of a community
D.	Involvement of 4 speces of 4 ecosystem
Answer» C. Involvement of 4 species of a community

discuss

50.	Match the column I with column II Column I Column II (1) Astacus (p) Hydrophiic skin (2) Marine turtle (q) green gland (3) Spiny lizard (r) water storage in intestine (4) Uromatrix (s) salt glands
A.	(1-q), (2-s), (3-p) (4-r)
B.	(1-s), (2-q), (3-p) (4-r)
C.	(1-s), (2-p), (3-q) (4-r)
D.	(1-p), (2-q), (3-s) (4-r)
Answer» A. (1-q), (2-s), (3-p) (4-r)

discuss

70+ Organism and Population Solved MCQs

What is true for the following statements ? Statement X : Migration of birds is influenced by light. Statement Y : Reproduction of birds is influenced by light. Statement Z : In all birds gonads are activated due to increase in intensity of light during summer. X Y Z

What is true for the given statements ? Statement X : Birds and Mammals obtain greater body size in cold region than in warm regions. Statement Y : Birds and Mammals are Homeothermic (warm blooded)animals. Statement Z : Reptiles are smaller in cold region.

“Spiny lizard” absorbs water from the atmosphere which is appropriate similar functional option for the statement ?

What is true for the following statements ? Statement X : Marine fishes have chlorine secretory cells. while riverine fishes have chlorine cells. Statement Y : Compared to marine water, fluid present in fish is hypotonic while reverine water is hypertonic compared to fluid present in fish. X Y X Y

Which animal is capable of obtaining water by oxidation of lipid.

Which is the example of intraspecific competition for food ?

Name the animals with freshwater habit in which (i) endosmosis is possible (ii) Excess water in removed by green glands (iii) Greenglands removes water in the from of urine

In snakes realised (actual) natality is less than potential natality; because.....

Indentify me “ My functioning is like an orchid.

Crustacian Astacus = Green land Marine turtle what is ‘X’ accroding to the information given ?

Which of the following is correct statement ?

Parasitic animal which is part of bio-geo community and included as zoo planktons and mesofauna of tenestrial ecosystem is ....

From the given option which is the appropriate for ecto parasite animal Ascaris, Tapeworm, plas modium, mites

Which living organism is seen in the hot water spring having temperature more than 100 C ..

Find out population density. Since last 4 years number of lions in a squre forest is 500 (length of forest =10 km)

Average human population in a certain time area is 5000 in which 1111 children are produced during an years, find out the birth rate ?

In birthrate and deathrate is equal, then what will be the Vital Index ?

Which option is correct for the given statement . Statement X : Density dependent factors are intrinsic Reason R : They are generated in population only

In a population of frog ‘J’ type of population growth curve is seen than which information from the given graph can be true for “ point A” (i) Vital Index < 100 (ii) Birth rate < death rate (iii) Birht rate > death rate

The given graph shows seasonal changes in the population of Birds of Gujarat in the year 2002. In the given graph what is true for point X ?

Producers --->Decomposers ---->’X’, then what will be ‘X’ ?

In given chart,what is the problem seen in living organism staying in‘X’ denoted area ?

What is correct for the given statement ? Statement P : Environmental study is linked with ecology StatementQ : Ecology is included in environmental study.

What is the vital Index, if Birht rate is 0 and Death rate = 5 ?

If the Birth rate is 10 and death rate is 0 then what is VITAL INDEX ?

Which is appropriate for the following statement ? Statement X : Pacific salmon fish reproduces only once in its life time. Statement Y : In a reproductive season it lays 2,80,000,000 eggs. X Y

Mycobiont Supplies X to phycobiont and phycobiont supplies Y to mycobiont, then what is true for X and Y ?

In a population of salmon fish, potential Natality is 10,000 while realised mortality is 200, then the Vitlal Index =

Which of the following is not possible in ecosystem where microflora is absent

If marine fish is kept in fresh water, will it survive

What is true for both the organism showing interspecific compitition ?

If at “t” time population density is N, then what is the equation for the population density at (t+1) time ?

Write appropriate option for antibiosis

In which subdivision of aquatic ecosystem thermal stratification in seen ?

In which of the following aquatic ecosystems habitat fluid (liquid) is very concetrated compared to body fluid ?

Which of the following is true with reference to temperature diffrence ?

Water holding capacity of land depends on ?

What true for the following statements ? Statement X : During evolution many species, by continous development of their internal environment, made their physiologycal processes more efficient. Statement Y : Orgenisms show adaptations in order to survive in the enviornment X Y X Y

In which of the following organism water is stored in its transformed from and not water as such ?

Which path is followed by plants as a part of adaptation in an ecosystem where Kangaroo rat is living ?

Which is true for the following statements ? Statement X : Cursorial animals have spindle shaped body Statement Y : Because of narrow head they can prepare burrow properly X Y

What is the temperature at which archeobacteria can survive ?

To whom can we correlate the young one developing from the eggs of Daphnis which are laid at normal room temperature ? (i) queen bee (ii) worker bee (iii) male (drone) bee

Hygroscopic skin is seen in.....

What is true for marine animals ?

In order to find out VITAL INDEX in Rampur Village, following information was gathered Death Rate = 1/x Birth Rate = z Average population = 1/y What is the Vital Index ?

What is the true for the community ecology diagram ?

Match the column I with column II Column I Column II (1) Astacus (p) Hydrophiic skin (2) Marine turtle (q) green gland (3) Spiny lizard (r) water storage in intestine (4) Uromatrix (s) salt glands

What is true for the following statements ?
Statement X : Migration of birds is influenced by light.
Statement Y : Reproduction of birds is influenced by light.
Statement Z : In all birds gonads are activated due to increase in intensity of light during summer.
X Y Z

What is true for the given statements ?
Statement X : Birds and Mammals obtain greater body size in cold region than in warm regions.
Statement Y : Birds and Mammals are Homeothermic (warm blooded)animals.
Statement Z : Reptiles are smaller in cold region.

What is true for the following statements ?
Statement X : Marine fishes have chlorine secretory cells. while riverine fishes have chlorine cells.
Statement Y : Compared to marine water, fluid present in fish is hypotonic while reverine water is hypertonic compared to fluid present in fish.
X Y X Y

Name the animals with freshwater habit in which
(i) endosmosis is possible
(ii) Excess water in removed by green glands
(iii) Greenglands removes water in the from of urine

In a population of frog ‘J’ type of population growth curve is seen than which information from the given graph can be true for “ point A”
(i) Vital Index < 100
(ii) Birth rate < death rate
(iii) Birht rate > death rate

What is correct for the given statement ?
Statement P : Environmental study is linked with ecology
StatementQ : Ecology is included in environmental study.

Which is appropriate for the following statement ?
Statement X : Pacific salmon fish reproduces only once in its life time.
Statement Y : In a reproductive season it lays 2,80,000,000 eggs.
X Y

What true for the following statements ?
Statement X : During evolution many species, by continous development of their internal environment, made their physiologycal processes more efficient.
Statement Y : Orgenisms show adaptations in order to survive in the enviornment
X Y X Y

Which is true for the following statements ?
Statement X : Cursorial animals have spindle shaped body
Statement Y : Because of narrow head they can prepare burrow properly
X Y

In order to find out VITAL INDEX in Rampur Village, following information was gathered
Death Rate = 1/x Birth Rate = z
Average population = 1/y
What is the Vital Index ?

Match the column I with column II
Column I Column II
(1) Astacus (p) Hydrophiic skin
(2) Marine turtle (q) green gland
(3) Spiny lizard (r) water storage in intestine
(4) Uromatrix (s) salt glands