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NEET Biology MCQ
Organisms And Population Mcq
Quiz 8
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Q.1
Which of the following is not included as the climax community of general processof succession ?
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a) Sedge-meadow stage
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b) phytoplanktones
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c) Forest
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d) Grassland
Explanation
Answer:(b)
Q.2
Darwinian fitness means:
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a) Maximise their reproductive fitness.
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b) Breed only once in life time.
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c) Large number of small sized organisms.
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d) Survival of the fittest.
Explanation
Answer:(a)
Q.3
In the logistic growth equation given below, the carrying capacity is represented by
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a) N
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b) r
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c) K
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d) K- N/K
Explanation
Answer:(c)
Q.4
A compound which is produced by an organism that inhibits grown organism is called
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a) xenobiotics
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b) antibiotics
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c) antibody
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d) interferon
Explanation
Answer:(b)
Q.5
Niche is defined as:
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a) The position of species in a community in relation to other species.
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b) Place where an organism live.
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c) Small space where organism lives and performs its functions, range of tolerance.
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d) Place where population perform their duties.
Explanation
Answer:(c)
Q.6
From the given option which is the appropriate for ecto parasite animal Ascaris, Tapeworm, plasmodium, mites
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a) phytoplanktons
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b) mesofauna
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c) macrofauna
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d) phytoplanktons and mesofauna.
Explanation
Answer:(c)
Q.7
which type of pyramid is true for the population having more number of pre reproductive and reproductive age group ? a = post reproductive age group b = reproductive age group c = pre reproductive age group
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b)
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c)
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d) None of the above
Explanation
Triangular age pyramid has high proportion of preoperative individuals, moderate number of reproductive individuals and fewer post-reproductive individuals. It represents young or rapidly growing population. In urn-shaped age pyramid, the number of reproductive individuals is higher than the number of pre-reproductive individuals. It represents declining or diminishing population with negative growth. In bell-shaped age pyramid, the number of pre-reproductive and reproductive individuals is almost equal. Post reproductive individuals are comparatively fewer. It represents stable or stationary population, neither growing nor diminishing. Answer:(b)
Q.8
Closely related species of warblers living on the same tree are example for:
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a) Intraspecific competition.
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b) Gause’s competitive exclusion principles.
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c) Avoid competition and resource partitioning.
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d) Connell’s elegant field experiment.
Explanation
Five species of insectivorous wood warblers -- Cape May, Yellow-rumped, Black-throated Green, Blackburnian, and Bay-breasted -- were the subject of a classic study of community ecology (the science of interpreting species interactions). These species often share the same breeding grounds in mature coniferous forests. They had been thought by some ornithologists to occupy the same niche -- in other words, they appeared to assume identical roles in the same bird community. These five warblers would thus be an exception to the ecological rule of competitive exclusion. The rule states that two species with essentially the same niche cannot coexist because one will always out-compete and displace the other. MacArthur concluded that "the birds behave in such a way as to be exposed to different kinds of food." They also have somewhat different nesting times, and thus the times of their peak food requirements are not the same. They are partitioning a limiting resource -- their supply of insects, and, in the process, occupying different niches Answer:(c)
Q.9
At ‘t’ time, population density is ‘N’ and at t+1 time population density is Nt+1/If Nt+1 - Nt then find out the correct option
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a) B-D +I-E ≠ 0
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b) B-D+I-E = 0
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c) B+D-I+E +0
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d) B+D-I+E ≠ 0
Explanation
Answer:(b)
Q.10
A biologist studied the population of rats in a bran. He found that the average natality was 250, average mortality 240, immigration 20 and emigrationThe net increase in population is
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a)10
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b) 15
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c) 05
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d) zero
Explanation
Answer:(d)
Q.11
Read the following statements find number of correct statements: (i) Recent studies support competition as suggested in Gause’s competitive exclusion principle. (ii) Gause’s hypothesis says if two species compete for same resource then one will be eliminated by another species. (iii) More recent studies point out that species facing competition might evolve mechanisms that promote co – existence rather than exclusion. (iv) Gause’s competitive exclusion principle is effective when resources are in excess. (v) Unlimited resources give better opportunity for adaptation.
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a) (ii) and (iii).
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b) (i), (ii) and (iv).
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c) (iii), (iv) and (v).
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d) (i), (iv) and (v).
Explanation
Answer:(d)
Q.12
Y↔X having interspecific relations in which animal which is not affected is X shows excretory organs which are also seen in Y and is Z located in its gills then.... what are X,Y,Z - ?
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a) X = Termite Y = flagelates Z = Tentacles
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b) X = shank Y = Tortoise Z = Chlorine cell
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c) X = shank Y = fishZ = chlorine secreting cells
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d) All of these (above)
Explanation
Answer:(c)
Q.13
Resemblance of one organism to another for protection and hiding is
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a) mimicry
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b) predation
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c) adaptation
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d) camouflage
Explanation
Answer:(a)
Q.14
In cold blooded animals, the body temperature tends to match with the environmental temperature in which they live. They are also known as:
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a) Ectotherms.
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b) Endotherms.
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c) Warm blooded animals.
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d) Both (B) and (C).
Explanation
Answer:(a)
Q.15
Geometric representation of age structure is a characteristic of
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a) Biotic community
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b) Population
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c) Landscape
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d) Ecosystem
Explanation
Answer:(b)
Q.16
The process where a population inhibits the growth of other population without affecting itself is known as
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a) amensalism
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b) parasitism
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c) mutualism
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d) commensalism
Explanation
Answer:(a)
Q.17
Match the following:
Column I (Biomes)
Column II (Appro.Rainfall Annually)
A. Evergreen tropical forst
25-75 cm
B. Tropical deciduous forst
50-75 cm
C. Taiga
75 -150 cm
D. Temperate deciduous forest
100-250 cm
E. Chaparral
100-200 cm
F. Grassland and Savannah
250-400 cm
G. Desert
Less than 25cm
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a) a=1; b=2, c=3, d=4, e=5, f=6, g=7
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b) a=2; b=1, c=4, d=5, e=6, f=7, g=3
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c) a=2; b=1, c=4, d=3, e=7, f=6, g=5
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d) a=6; b=5, c=4, d=3, e=2, f=1, g=7
Explanation
Answer:(d)
Q.18
Match the following: 34521.
Column I
Column II
a. Hibernation
Birds
b. Aestivation
Bacteria and fungi
c. Diapause
Reptiles and polar bears.
d. Spore formation
Snail and fishes.
e. Migration
Zooplanktons and insects.
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a) a → 3 ; b → 4 ; c → 1 ; d → 2 ; e → 5
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b) a → 3 ; b → 4 ; c → 2 ; d → 1 ; e → 5
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c) a → 3 ; b → 4 ; c → 5 ; d → 1 ; e → 2
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d) a → 3 ; b → 4 ; c → 5 ; d → 2 ; e → 1
Explanation
Answer:(d)
Q.19
Which is correctly labelled with respect to the given diagram?
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a) B : Logistic curve
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b) C : Carrying capacity
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c) C : Exponential curve
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d) A: Carrying capacity
Explanation
Answer:(d)
Q.20
Mark the correct identification from the following picture of Biome distribution with respect to annual temperature and precipitation
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a) 1 – Grassland, 2 – Temperate forests, 3 – Tropical rain forests, 4 – Tundra.
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b) 1 – Desert, 2 – Coniferous forests, 3 – Temperate forests, 4 – Tundra.
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c) 1 – Grassland, 2 – Coniferous forests, 3 – Temperate forests, 4 – Arctic region.
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d) 1 – Grassland, 2 – Temperate forests, 3 – coniferous forests, 4 – Arctic and Alpine tundra.
Explanation
Answer:(d)
Q.21
The graph of age related distribution in a village is as following. If during 1 year potential mortality = relized mortality, then which type of graph is seen after 1 year ?
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a)
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b)
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c)
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d)
Explanation
Answer:(d)
Q.22
Population of CBM Village year wise 2000 → 100 2005 → 400 2010 → 600 2012 →800 What will the appropriate graph for this
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a)
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b) Irruptive
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c) ‘S' shape
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d) J shape
Explanation
Answer:(b)
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