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NEET Biology MCQ
Organisms And Population Mcq
Quiz 7
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Q.1
How mandy sq. km. area of biosphere is occupied by marine habitat. ?
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a) 3,62,000,000
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b) 36 crore 20 lacs
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c) 36,20 Million
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d) all of these
Explanation
Answer:(d)
Q.2
Biological control as pest control in agriculture is an example of .....
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a) Predation
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b) Competition
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c) Emigration
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d) diseases
Explanation
Answer:(a)
Q.3
Asymptote in a logistic growth curve is obtained when
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a) The value of ‘r’ approaches zero
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b) K = N
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c) K > N
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d) K
Explanation
Answer:(b)
Q.4
Some students, during a study, caught, marked and released 80 fishes in a pond. Later 100 fishes were caught at random. Among these 40 were found to be marked. What is the approximate number of fishes in the pond?
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a) 50
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b) 100
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c) 200
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d) 4000
Explanation
According to Petersons Mark and Recapture method, the population (P) is given by P = m(r + u)/r, where m = number of marked fishes = 80 , r = number of marked fishes recaptured = 40 and u = number of unmarked fishes captured = 100 -40 = 60 Answer:(c)
Q.5
If the Bengal Tiger becomes extinct
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a) hyenas and wolves will become scars
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b) the wild areas will be safe for man and domestic animals
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c) its gene pool will be lost forever
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d) the populations of beautiful animals like deer will get stabilized
Explanation
Answer:(c)
Q.6
Some animals have a constant high body temperature. This is because
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a) they like this temperature
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b) they can work fast in the temperature
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c) they prefer to live in cold region
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d) they are active animals
Explanation
Answer:(b)
Q.7
A force acting against achievement of highest possible level of population growth is:
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a) Carrying capacity.
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b) Environmental resistance.
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c) Biotic potential.
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d) Darwinian fitness.
Explanation
Answer:(b)
Q.8
Assertion: The epiphytes use the trees only for attachment and manufacture their own food by photosynthesis. Reason: This type of interaction is a type of negative interaction which results in a negative effects on growth and survival of one or both of the population.
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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
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b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
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c) Assertion is true but Reason is false.
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d) Both Assertion and Reason are false.
Explanation
Answer:(c)
Q.9
Average human population in a certain time area is 5000 in which 1111 children are produced during an years, find out the birth rate ?
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a) 0.1111
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b) 0.3333
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c) 0.2222
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d) 0.4444
Explanation
Answer:(c)
Q.10
If at “t” time population density is N, then what is the equation for the population density at (t+1) time ?
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a) N (t+1) = Nt - [CD+E] - [B+I)]
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b) N (t+1) = Nt+B+I-D-E
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c) N (t+1) = Nt+(B+I)-(D+ E)]
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d) All of these
Explanation
Answer:(d)
Q.11
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
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a) i, ii
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b) i, iii
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c) ii, iii
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d) i, ii,iii
Explanation
Answer:(a)
Q.12
Consider the following adaptations in desert plants: (i) Many desert plants have a thick cuticle on their leaf surfaces and have their stomata arranged in surface to minimise water loss. (ii) They also have special photosynthetic pathway (CAM) that enables them to close their stomata during day. (iii) Leaves are modified as prickles in succulents like Opuntia. (iv) Photosynthetic function is taken over by the flattened stems. How many of the following statements are true:
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a) 1.
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b) 2.
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c) 3.
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d) 4.
Explanation
Statement "i" is not correct because, Many desert plants have very small stomata and fewer stomata than those of other plants. The stomata of many cacti lie deep in the plants' tissues. Statement "ii" and "iii" is correct Answer:(c)
Q.13
he figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do A, B and C represent respectively
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a) A= conformer ; B = regulator ; C = partial regulator
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b) A= regulator; B = partial regulator ; C = conformer
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c) A= partial regulator; B = regulator; C = conformer
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d) A= regulator; B = conformer ; C = partial regulator
Explanation
Answer:(d)
Q.14
What is true for marine animals ?
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a) Because of exosmosis they drink sea water
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b) As they drink sea water exosmosis occurs
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c) Because of exosmosis body fluid become hypotonic, so they drink sea water
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d) None of these
Explanation
Answer:(a)
Q.15
Which is related to the given statement ? In the begining of summer crow and koel lays eggs.
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a) As the light intensity decerease reproductive organs become active
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b) In some Birds increase or decrease in intensity of hight- makers reproductive organs active or inactive respecctivity
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c) with increase in temperture, gonads become active
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d) None of these
Explanation
Answer:(c)
Q.16
One of the major difficulties in the biological control of insect pest is that
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a) the predator develops a preference to other diets and may itself become a pest
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b) the predator does not always survive when transferred to a new environment
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c) the method is less effective as compared with the use of insecticides
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d) the practical difficulty of introducing the predator to specific areas
Explanation
Answer:(a)
Q.17
Match the column I and Column II and choose the correct option:
Column I
Column II
(a) Mutualism
Cattle egret and grazing cattle
(b) Commensalism
Lice on humans
(c) Parasitism
Sparrow ants in seeds
(d) Predation
Lichen
(e) Ammensalism
One is harmed and other is not harmed
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a) a=3; b=1; c=4; d=2; e=5
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b) a=1; b=2; c=4; d=5; e=3
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c) a=1; b=3; c=4; d=5; e=2
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d) a=4; b=1; c=2; d=3; e=5
Explanation
Answer:(d)
Q.18
In a population, percapita birth rate is 0.025 and percapita death rate is 0.008 during a unit time period. What is the intrinsic rate of natural increase for the population:
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a) 0.007.
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b) 0.017.
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c) 0.17.
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d) 0.71.
Explanation
Answer:(b)
Q.19
Which among the following is not a major biome of India?
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a) Tropical rain forests.
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b) Deciduous forests.
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c) Sea coast.
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d) Grasslands.
Explanation
Answer:(d)
Q.20
From the graph of given population growths, Select the correct option having the correct values from the bar graph:
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a)
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b)
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c)
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d)
Explanation
Answer:(d)
Q.21
What is the temperature at which archeobacteria can survive ?
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a) 90°C
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b) 100°C
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c) 110°C
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d) All of these
Explanation
Answer:(d)
Q.22
Which of the following is not a function of predators
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a) They act as conduits for energy transfer across trophic levels
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b) They keep prey populations under control
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c) They help in the stabilization of ecosystems
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d) They decrease the species diversity in a community
Explanation
Answer:(d)
Q.23
Two opposite forces operate in the growth and development of every population. One of them is related to the ability to reproduce at a given rate. The force opposite to it is called
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a) fecundity
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b) environmental resistances
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c) biotic control
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d) mortality
Explanation
Answer:(b)
Q.24
The sphere of living matter together with water, air and soil on the surface of earth is called
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a) atmosphere
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b) hydrosphere
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c) lithosphere
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d) biosphere
Explanation
Answer:(d)
Q.25
The plants which can withstand with narrow and broad range of temperature tolerance respectively are
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a) monothermal and stenothermal
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b) stenothermal and monothermal
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c) stenothermal andeurythermal
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d) stenothermal and mesothermal
Explanation
Answer:(c)
Q.26
Which of the following is not an Ectoparasite?
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a) Lice on humans
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b) Copepods on marine fishes
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c) Mistletoe on other plants
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d) Female Anopheles on humans
Explanation
Answer:(d)
Q.27
Co – evolution is not exhibited in which of the following interactions:
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a) Parasite – host relationship.
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b) Hermit crab and sea anemone.
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c) Ophrys orchid and bee.
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d) Fig flower and wasp.
Explanation
Answer:(b)
Q.28
What is the reason for the success of mammals to thrive in Antarctica or in the Sahara desert?
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a) Constant body temperature.
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b) Varying body temperature.
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c) Osmotic concentration very low.
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d) Relative amount of internal oxidation.
Explanation
Answer:(a)
Q.29
Which of the following is correct statement ?
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a) uromatrix lizard stores water in the intestine
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b) Camel stores water in its stomach
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c) Anabus develops accesary respiratory organs to respire in water.
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d) Kangaroo rat undegeoes hibernation.
Explanation
Answer:(c)
Q.30
X= Arthropods, Y = Mollusca, z = Coelenterates :-If the X by using Y, lives benifical life with z, then which of the following is correct example ?
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a) X = cockroachY = pearl oyester Z = Hydra
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b) X = Millipede Y = pila Z = jellyfish
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c) X = Hermit crab Y = Gastropoda Z = sea anenone
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d) All of these
Explanation
Answer:(c)
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