Organisms and Population Class 12 NEET Questions. We covered all the Organisms and Population Class 12 NEET Questions in this post for free so that you can practice well for the exam.
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MCQ on Organisms and Population for NEET Students
Frogs are cryptically colored so as to
(A) reject or reset parasites
(B) avoid being detected easily by the predator
(C) attract females for mating purposes
(D) promote pollination
Option b – avoid being detected easily by the predator
(A) one organism benefits and the other is harmed
(B) both organisms are harmed
(C) the interacting species live closely together
(D) the interacting species live in different geographical regions
Option c – the interacting species live closely together
Which of the following is true for Allen’s rule?
(A) Mammals from colder climates generally have longer ears and limbs for insulation.
(B) Mammals in colder climates generally have a low basal metabolic rate.
(C) Mammals in warmer climates generally have a high basal metabolic rate.
(D) Mammals from colder climates generally have shorter ears and limbs to minimize heat loss.
Option d – Mammals from colder climates generally have shorter ears and limbs to minimize heat loss.
The salinity of inland waters is
(A) less than 5 parts per thousand
(B) 30-35 parts per thousand
(C) 100 parts per thousand
(D) 500 parts per thousand
Option a – less than 5 parts per thousand
Which of the following adaptation is shown by Opuntia to minimize water loss through transpiration?
(A) Leaves are reduced to spines.
(B) Flattened stems take over the function of photosynthesis.
(C) The plant enters a stage of dormancy.
(D) both (A) and (B)
Option d – both (A) and (B)
Resource partitioning is a mechanism by which.
(A) two species compete for resources even if the resources are abundant
(B) two species competing for the same set of resources, instead of competing cooperate with each other for existence.
(C) distribution of a species is restricted in the presence of superior competent species in that area.
(D) related species competing for the same resources cannot co-exist and will eliminate the inferior species eventually.
Option b – two species competing for the same set of resources, instead of competing cooperate with each other for existence.
The interaction between sea anemones and clownfish is an example
(A) parasitism
(B) commensalism
(C) amensalism
(D) mutualism
Option b – commensalism
Which of the following exhibit ectoparasitism?
(A) Marine fishes and copepods
(B) Liverfluke and fish
(C) Ascaris and humans
(D) Plasmodium and Anopheles mosquito
Option a – Marine fishes and copepods
The interaction between …….. does NOT represent mutualism.
(A) Fungi and roots of higher plants
(B) Fungi and photosynthesizing algae
(C) Fig plant and the wasp
(D) Cuscuta and hedge plants
Option d – Cuscuta and hedge plants
MacArthur showed that organisms avoid competition and co-exist by using the example of
(A) closely related species of starfishes
(B) closely related species of tortoises
(C) closely related species of finches
(D) closely related species of warblers
Option d – closely related species of warblers
Which of the following is NOT a mechanism developed to minimize the effect of predation?
(A) Production of poisonous chemicals like cardiac glycosides
(B) Camouflaging by frogs
(C) Blubber in seal
(D) Distastefulness of the Monarch butterfly
Option c – Blubber in seal
Statement I: Heat loss or heat gain is a function of surface area. Statement II: Small animals have a larger surface area relative to their volume, so they have to expend much energy to generate body heat through metabolism when it is cold outside.
(A) Statement I is correct, and statement II is incorrect.
(B) Statement I is incorrect, and statement II is correct.
(C) Both statements I and II are correct.
(D) Both statements I and II are incorrect
Option c – Both statements I and II are correct.
Which of the following depicts inter-specific competition?
(A) Interaction between two cows
(B) Interaction between a lion and deer
(C) Interaction between a deer and cow
(D) Interaction between cactus and moth
Option c – Interaction between a deer and cow
Assertion: Seals have blubber below their skin. Reason: Blubber in seals aid in swimming.
(A) Both assertion and reason are true and the reason is the correct explanation of the assertion.
(B) Both assertion and reason are true and the reason is not the correct explanation of the assertion.
(C) The assertion is true but the reason is false.
(D) Both assertion and reason are false.
Option c – The assertion is true but the reason is false.
Read the given examples of animal interactions: i. Cuckoo and crow ii. Humans and Liverfluke iii. Mosquito and Plasmodium iv. Cuscuta and hedge plants. The above associations indicate which of the following interaction?
(A) Commensalism
(B) Predation
(C) Amensalism
(D) Parasitism
Option d – Parasitism
Read the given statements and select the correct option. Statement I: Nearly 25% of all insects are known to be phytophagous. Statement II: Cattle or goats browsing on Calotropis plants show enhanced milk production.
(A) Statement I is correct, while statement II is incorrect
(B) Statement I is incorrect, while statement II is correct
(C) Both statement I and statement II are correct
(D) Both statement I and statement II are incorrect
Option a – Statement I is correct, while statement II is incorrect
Read the following statements (i-iv) and identify the incorrect statements i. Mammals are considered highly successful animals due to their ability to maintain a constant body temperature. ii. Keoladeo National Park in Rajasthan hosts thousands of migratory birds in winter coming from Siberia. iii. All plants and animals are regulators. iv. Conformers can regulate their body temperature in spite of the changes in the external environment.
(A) (i) and (ii)
(B) (ii) and (iii)
(C) (iii) and (iv)
(D) (i) and (iv)
Option c – (iii) and (iv)
…….. represents the relationship between fungi and roots of higher plants.
(A) Calotropis
(B) Lichen
(C) Mycorrhiza
(D) Rauwolfia
Option c – Mycorrhiza
Which of the following is the reason for the extinction of the Abingdon tortoise in the Galapagos island on the introduction of goats on the island?
(A) Goats had a lower intrinsic rate of natural increase.
(B) Goats had a greater browsing efficiency.
(C) Both had an equal intrinsic rate of natural increase.
(D) Abingdon tortoise had a higher intrinsic rate of natural increase.
Option b – Goats had a greater browsing efficiency.
Bears avoid the stress in winter by undergoing ( Organisms and Population Class 12 NEET Questions )
(A) hibernation
(B) aestivation
(C) diapause
(D) migration
Option a – hibernation
Cuscuta is a
(A) parasitic plant
(B) hedge plant
(C) weed growing in an abandoned field
(D) phytophagous plant
Option a – parasitic plant
Kangaroo rats can survive the heat in North American deserts because it
(A) has a thick layer of blubber below its skin
(B) brings about the oxidation of stored fat to produce water as a byproduct
(C) can concentrate its urine to reduce water loss
(D) Both (B) and (C)
Option d – Both (B) and (C)
Tiger census in national parks and sanctuaries is based on the parameters like
(A) Faecal pellets only
(B) Pug marks and faecal pellets
(C) Pug marks only
(D) Headcounts
Option b – Pug marks and faecal pellets
If the + sign is assigned to beneficial interaction, the – sign to detrimental, and the ‘0’ sign to neutral interaction, then the population interaction represented by ‘-‘ and ‘0’ refers to
(A) mutualism
(B) parasitism
(C) amensalism
(D) commensalism
Option c – amensalism
We covered all the organisms and population class 12 neet questions above in this post for free so that you can practice well for the exam.
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