Categorisation of a group of living beings

Series of ordered groupings within system

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NEET • BIOLOGY • ORGANISMS AND POPULATION

Organisms and population practice · Easy

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Showing 31-60 of 64 questions

31 Easy

31 of 64

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Autecology is the study of relationship between

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Correct option: A

Population and its environment

Option A (Population and its environment) is correct because autecology specifically studies the relationship of a single species population with its environment.

32 Easy

32 of 64

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Heat loss or heat gain is a function of surface area. Since small animals have a …A… relative to their volume, they tend to lose body heat very fast, when it is cold outside; then they have to expend …B… to generate body heat through metabolism. This is the main reason why very small animals are …C… found in polar regions
Choose the correct options for A, B and C

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Correct option: A

A-larger surface area, B-much larger, C-rarely

Option A (A-larger surface area, B-much larger, C-rarely) is correct because small animals have a larger surface area to volume ratio, lose heat quickly, and need to expend more energy, making them rare in polar regions.

33 Easy

33 of 64

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According to Allen’s rule, the mammals from colder climates have

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Correct option: D

Shorter ears and shorter limbs

Option D (Shorter ears and shorter limbs) is correct because Allen's rule states that mammals in colder climates have shorter extremities to reduce heat loss.

34 Easy

34 of 64

Analyzing +4 | -1

Few species have evolved adaptations to avoid unfavourable conditions by escaping in time. Choose the odd one w.r.t. it.

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Correct option: D

Migration

Option D (Migration) is correct because migration involves moving to a different location to avoid unfavorable conditions, while aestivation, hibernation, and diapause are all states of dormancy.

35 Easy

35 of 64

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Hierarchy is

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Correct option: C

Either (1) or (2)

Option C (Either (1) or (2)) is correct because hierarchy can refer to the categorization of living beings or a series of ordered groupings within a system.

36 Easy

36 of 64

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In most animals, the metabolic reactions proceed in a …A… temperature range (in humans, it is 37℃). But there are microbes (archaebacteria) that flourish in hot springs and deep sea hydrothermal vents where temperature far exceed …B…
Choose the correct option for A and B

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Correct option: A

A-narrow; B-100℃

Option A (A-narrow; B-100℃) is correct because metabolic reactions typically occur within a narrow temperature range, but some microbes can thrive in extreme temperatures exceeding 100℃.

37 Easy

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Adaptation of parasite may be
I. loss of unnecessary organs
II. presence of adhesive organs
III. origin of suckers to cling to host
IV. loss of digestive system
V. high reproductive capacity
Choose the correct combination

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Correct option: D

I, II, III, IV and V

Option D (I, II, III, IV and V) is correct because all the listed adaptations are commonly found in parasites to enhance their survival and reproduction within a host.

38 Easy

38 of 64

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Organism which are restricted to low range of temperature are called

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Correct option: B

Stenothermals

Option B (Stenothermals) is correct because stenothermals are organisms that can only tolerate a narrow range of temperatures.

39 Easy

39 of 64

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Plants developing in dry condition are

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Correct option: A

Xerophytes

Option A (Xerophytes) is correct because xerophytes are plants adapted to survive in dry conditions.

40 Easy

40 of 64

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Sunlight is available as a source of energy. The sunlight is very much important in

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Correct option: B

Photosynthesis

Option B (Photosynthesis) is correct because sunlight is essential for photosynthesis, the process by which plants convert light energy into chemical energy.

41 Easy

41 of 64

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The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?

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Correct option: C

Its population growth curve is of J-type

Option B (Nutrients) is correct because mycorrhizae are symbiotic associations between fungi and plant roots that enhance the absorption of nutrients, especially phosphorus, from the soil.

42 Easy

42 of 64

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5th June is celebrated as

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Correct option: B

World environment day

Option B (World environment day) is correct because 5th June is internationally recognized as World Environment Day.

43 Easy

43 of 64

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Identify the basic levels of ecology
I. Organisms II. Populations
III. Communities IV. Biomes
V. Human VI. Vertebrates
Choose the correct option

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Correct option: C

I, II, III and IV

Option C (I, II, III and IV) is correct because organisms, populations, communities, and biomes represent the fundamental levels of ecological organization.

44 Easy

44 of 64

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Formation of wide variety of habitats takes place by

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Correct option: C

Regional and local variation of environment conditions

Option C (Regional and local variation of environment conditions) is correct because the formation of diverse habitats is primarily driven by variations in environmental conditions across different regions and localities.

45 Easy

45 of 64

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Altitude sickness is

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Correct option: C

Physiological adaptation

Option C (Physiological adaptation) is correct because altitude sickness is a result of the body's physiological response to low oxygen levels at high altitudes.

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46 Easy

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Living in same habitat, organisms of same species of form

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Correct option: C

Population

Option C (Population) is correct because a population is defined as a group of organisms of the same species living in the same habitat.

47 Easy

47 of 64

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Competition of species leads to

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Correct option: A

extinction

Option C (Mutualism) is correct because plant and pollinator interactions are typically mutualistic, where the plant benefits from pollination, and the pollinator benefits from food (nectar or pollen).

48 Easy

48 of 64

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Phenotypic variants formed in a population due to change in environment are called

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Correct option: A

Ecophenes

Option A (Ecophenes) is correct because ecophenes are phenotypic variations in a population that arise due to environmental influences.

49 Easy

49 of 64

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Ecological hierarchy comprises, which of the following sequence

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Correct option: B

Species → Population → Community → Ecosystem → Biosphere

Option B (Species → Population → Community → Ecosystem → Biosphere) is correct because this sequence accurately represents the increasing complexity of ecological organization.

50 Easy

50 of 64

Analyzing +4 | -1

Assertion (A): The female mosquito is not considered a parasite, although it needs human blood for reproduction.
Reason (R): The female mosquito does not takes free lodging from human.

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Correct option: D

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

Option D is correct because both the assertion and the reason are true, and the reason correctly explains the assertion. Mosquitoes need blood for reproduction, not lodging.

51 Easy

51 of 64

Remembering +4 | -1

A population interaction in which one species is benefitted and other species remains unaffected (+, 0) is called

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Correct option: C

Commensalism

Option C (Commensalism) is correct because commensalism is a relationship where one species benefits and the other is neither harmed nor helped (+, 0).

52 Easy

52 of 64

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Which of the following is the stage of suspended development?

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Correct option: D

Diapause

Option D (Diapause) is correct because diapause is a state of suspended development in insects and other animals.

53 Easy

53 of 64

Analyzing +4 | -1

Find odd one out, according to parasitism.

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Correct option: B

Plasmodium

Option B (Plasmodium) is correct because it is an endoparasite, while the others are ectoparasites.

54 Easy

54 of 64

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Exotic species are also called
I. introduced species
II. alien species
III. non-indigenous species
IV. non-native species
Choose the correct combination

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Correct option: D

I, II, III and IV

Option D (I, II, III and IV) is correct because introduced, alien, non-indigenous, and non-native are all synonyms for exotic species.

55 Easy

55 of 64

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What is the name of the interaction between species when one’s fitness dominates the other’s existence and fitness?

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Correct option: A

Competition

Option A (Competition) is correct because competition occurs when one species' fitness negatively impacts another's, potentially dominating its existence.

56 Easy

56 of 64

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Diapause is stage of suspended development in lakes and ponds. Find out the season in which it occurs

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Correct option: B

Winter

Option B (Winter) is correct because diapause, a state of suspended development, is a common adaptation to survive harsh winter conditions in lakes and ponds.

57 Easy

57 of 64

Application +4 | -1

In a life table, the number of individuals alive at the beginning of the 1st year to 2nd year interval is 800. During this interval, 200 individuals die. The death rate for this interval is

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Correct option: A

0.25

The correct answer is A (0.25) because the death rate is calculated by dividing the number of deaths by the initial number of individuals.

58 Easy

58 of 64

Understanding +4 | -1

The maintenance of internal favourable conditions, by a self regulated mechanism inspite of the fact that there are changes in environment, is known as:

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Correct option: C

Homoeostasis

Option C (Homoeostasis) is correct because homeostasis is the maintenance of stable internal conditions in an organism.

59 Easy

59 of 64

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Which of the following is an example of a defence used by plants against herbivores?
I. Production of caffeine, tannin quinine
II. More production of non-woody tissues
III. Productions of hairs, thorns, spines
IV. Production of hormone-like chemicals that interfere with insect metamorphosis
Select the correct pair

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Correct option: D

I, III and IV

Option D (I, III and IV) is correct because caffeine, tannins, and quinine are defensive chemicals, hairs/thorns/spines provide physical defense, and hormone-like chemicals disrupt insect development.

60 Easy

60 of 64

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Diapause is

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Correct option: B

Stage of suspended development

Option B (Stage of suspended development) is correct because diapause is a period of dormancy or suspended development in insects and other animals.

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