NEET Biology Multiple Choice Questions – Organisms and Populations

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NEET Biology Organism And Environment Species And Population Multiple Choice Questions

Question 1. The annual growth rate for developing countries is:

  1. 5%
  2. 2%
  3. 2.5%
  4. 8%.

Answer: 3. 2.5%

Question 2. The study of the interrelationship between living organisms and their environment is called:

  1. Phytosociology
  2. Phytogeography
  3. Ecology
  4. Ecosystem.

Answer: 3. Ecology

Question 3. Plants and animals living in a given area constitute:

  1. Population
  2. Ecosystem
  3. Community
  4. Plankton.

Answer: 3. Community

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Question 4. The carrying capacity of an environment is determined by:

  1. Birth rate
  2. Death rate
  3. Limiting resources
  4. Population growth rate.

Answer: 3. Limiting resources

Organisms And Populations NEET Questions

Question 5. If there is a large gap between the birth rate and death rate in Haryana we can infer that Haryana would tend to have:

  1. More of old men
  2. More school-going children
  3. Lower rate of fertility
  4. Low dependency ratio.

Answer: 1. More of old men

Question 6. Demography is the study of statistics that deals with:

  1. Geography
  2. Population growth
  3. Local concentration of individuals
  4. Family pedigrees.

Answer: 2. Population growth

Question 7. The parameter for describing a population is:

  1. Time
  2. Number and kind
  3. Space or area
  4. All the above.

Answer: 4. All the above.

Question 8. The most thickly populated state in India is:

  1. U.P.
  2. Tamil Nadu
  3. West Bengal
  4. Kerala.

Answer: 3. West Bengal

Question 9. The most thinly populated state in India is:

  1. Sikkim
  2. Himachal Pradesh
  3. Rajasthan
  4. Arunachal Pradesh.

Answer: 4. Arunachal Pradesh.

Organisms And Populations NEET Questions

Question 10. Which of the following is monogamous

  1. Seal
  2. Deer
  3. Woodpecker
  4. Swan.

Answer: 4. Swan

Question 11. Which of the following is polygamous?

  1. Rat
  2. Wolf
  3. Deer
  4. Fox.

Answer: 3. Deer

Question 12. Which of the following lives in flocks?

  1. Deer
  2. Duck
  3. Elephant
  4. Monkey.

Answer: 2. Duck

Question 13. Animals found in herds is:

  1. Mice
  2. Swan
  3. Parrot
  4. Deer.

Answer: 4. Deer

Question 14. The human population first began to grow exponentially at the time of:

  1. Tool using revolution
  2. Agricultural revolution
  3. Industrial revolution
  4. First World War.

Answer: 2. Agricultural revolution

Question 15. About how many people starve to death each day?

  1. 1000
  2. 10,000
  3. 70,000
  4. 600,000.

Answer: 3. 70,000

Organisms And Populations NEET Questions

Question 16. The growth of the human population is most rapid in the:

  1. Tropical and subtropical regions
  2. Temperate region
  3. Asia
  4. North America.

Answer: 1. Tropical and subtropical regions

Question 17. What constitutes the most important boundary between different species?

  1. Territory
  2. Morphology
  3. Reproductive isolation
  4. Mode of nutrition

Answer: 3. Reproductive isolation

Question 18. Offspring of a stallion and Janet is called :

  1. Stajon
  2. Hinny
  3. Mule
  4. Mare.

Answer: 2. Hinny

Question 19. Population density is expressed by :

  1. D = N + S
  2. D = N x S
  3. D = N÷S
  4. D = N-S.

Answer: 3. LD = N÷S

Question 20. Fingers and legs are shorter in colder regions. It is:

  1. Jorden’s rule
  2. Lindeman’s rule
  3. Allen’s rule
  4. Gloger’s rule.

Answer: 3. Allen’s rule

Organisms And Populations NEET Questions

Question 21. Population whose members reproduce asexually are termed:

  1. Panimictic
  2. Ecotype
  3. Apomictic
  4. Amphimictic

Answer: 3. Apomictic

Question 22. Population whose members reproduce are termed:

  1. Panimictic
  2. Apomictric
  3. Species
  4. Amphimictic.

Answer: 4. Amphimictic

Question 23. The study of interactions of an individual organism or a single species with the living and non-living components of its environment is:

  1. Autoecology
  2. Autoecious
  3. Autogamy
  4. Autonomy.

Answer: 1. Autoecology

Question 24. Ecological studies of plants were first started by:

  1. Warming
  2. Daubenmire
  3. Good
  4. Raunkier.

Answer: 1. Warming

Question 25. Synecology refers to the ecological study of:

  1. A population of species growing together
  2. Animals
  3. Plants
  4. Microbes.

Answer: 1. A population of species growing together

Question 26. All the living organisms on earth constitute:

  1. Community
  2. Biosphere
  3. Species
  4. Biome.

Answer: 2. Biosphere

NEET Important Questions On Ecology

Question 27. Individuals of the same species in a particular locality constitute:

  1. Population
  2. Hydrosphere
  3. Flora
  4. Fauna.

Answer: 1. Population

Question 28. Migration refers to:

  1. One-way outward movement
  2. One-way inward movement
  3. Periodic departure and return
  4. Death of individuals.

Answer: 3. Periodic departure and return

Question 29. Which of the following is an example of proto-cooperation?

  1. Echiuroid worm and small annelid
  2. Sea anemone and hermit crab
  3. Nitrogen-fixing bacteria and leguminous plants
  4. Trichophyta in the gut of termite.

Answer: 2. Sea anemone and hermit crab

Question 30. Gametophyte and sporophyte stages of a fern plant should ecologically be considered as:

  1. Two distinct species
  2. Two stages of a species
  3. Two varieties of a species
  4. Two organisms of a colony.

Answer: 2. Two stages of a species

Question 31. Which of the following is related to synecology?

  1. Same species
  2. Different species
  3. Both(1) and (2)
  4. None of above

Answer: 2. Different species

NEET Important Questions On Ecology

Question 32. Competition is most severe in two:

  1. Species
  2. Families
  3. Niche
  4. Orders

Answer: 1. Species

Question 33. The territory is defended against:

  1. Predator
  2. Any intruder
  3. Intruder of another species
  4. Intruder of the same species.

Answer: 4. Intruder of the same species

Question 34. Which of the following shows the polymorphism?

  1. Caricci papaya
  2. Apis indicia
  3. Volvox
  4. Both (2) and (3).

Answer: 4. Both (2) and (3)

NEET Questions Organisms and Populations Question 35. Cross-fertilization in plants is a kind of:

  1. Competitive interaction
  2. Co-operative interaction
  3. Parental care
  4. All the above.

Answer: 2. Co-operative interaction

Question 36. An interaction between two or more organisms when the resources necessary for them are limited refers to:

  1. Co-operation
  2. Competition
  3. Aggregation
  4. Family formation.

Answer: 2. Competition

Question 37. Flams and animals living in a given area form:

  1. Community
  2. Population
  3. Plankton
  4. Ecosystem.

Answer: 1. Community

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Question 38. Sub-groups of a population capable of interbreeding are called as:

  1. Subpopulation
  2. Dummies
  3. Demes
  4. Biomes

Answer: 3. Demes

Question 39. In red deer, the herd is:

  1. Matriarchal
  2. Patriarchal
  3. Matriarchal or Patriarchal
  4. Not applicable.

Answer: 1. Matriarchal

Question 40. The biotic potential is counteracted by:

  1. Limitation of food supply
  2. Competition with other organisms
  3. The producer is the largest
  4. Both (1) and (2).

Answer: 1. Limitation of food supply

Question 41. The carrying capacity is determined by its:

  1. Death rate
  2. Filming resource
  3. Population growth rate
  4. Both (2) and (3).

Answer: 2. Flimiting resource

Question 42. A population can grow exponentially:

  1. When food is the only limiting resource
  2. When first invading a suitable and previously unoccupied habitat
  3. Only if there is no predation
  4. Only in the laboratory.

Answer: 2. When first invading a suitable and previously unoccupied habitat

Question 43. Which of the following does not directly affect biotic potential?

  1. A female’s age of first reproduction
  2. Carrying capacity of the environment
  3. Length of time a female is fertile
  4. Average number of offspring per brood or litter.

Answer: 2. Carrying capacity of the environment

Question 44. Which of the following chemical compounds helps in transmitting the message to other species of members?

  1. Alternative
  2. Ptyalin
  3. Pheromones
  4. None of the above.

Answer: 3. Pheromones

Question 45. The sympatric population cannot be isolated by:

  1. Behavioral barriers
  2. Seasonal barriers
  3. Habitat barriers
  4. Geographical barriers.

Answer: 4. Geographical barriers

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Question 46. Term-species in ecology refers to:

  1. Autoecology
  2. Synecology
  3. Community ecology
  4. Paleoecology.

Answer: 1. Autoecology

Question 47. Population surge 230 years ago was due to:

  1. Industrial revolution
  2. Agricultural revolution
  3. Cultural revolution.
  4. Intellectual revolution.

Answer: 1. Industrial revolution

Question 48. The leveling of an S-shaped curve describing population growth is caused by:

  1. Carrying capacity
  2. The competitive exclusion
  3. Environmental resistance
  4. A change in the biotic potential.

Answer: 3. Environmental resistance

Question 49. The abundance of a species population within its habitat is called:

  1. Niche density
  2. Absolute density
  3. Relative density
  4. Regional density.

Answer: 1. Niche density

Question 50. Mule is produced by breeding:

  1. Mule and mare
  2. Horse and female ass
  3. Horse and mare
  4. Male ass and bitch.

Answer: 1. Mule and and mare

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Question 51. When the population reaches carrying capacity:

  1. Mortality rate = Birth rate
  2. Mortality rate > Birth rate
  3. Mortality rate < Birth rate
  4. None of the above.

Answer: 1. Mortality rate = Birth rate

Question 52. Pheromones are secreted by certain exocrine cutaneous gland affect.

  1. Genitalia
  2. Skin colour
  3. Breast
  4. Mutual behavior of members of a species.

Answer: 4. Mutual behavior of members of a species

Question 53. The area covered by members of a species in search of food and mates is called:

  1. Range
  2. Home range
  3. Territory
  4. Habitat.

Answer: 2. Home range

Question 54. Crow also incubates the eggs of:

  1. Pigeon
  2. Dove
  3. Cuckoo
  4. Weaver bird.

Answer: 3. Cuckoo

Question 55. Pheromones of insects are:

  1. Growth promoters
  2. Growth inhibitors
  3. Means of communication
  4. Chemicals of unknown utility.

Answer: 3. Means of communication

Best MCQs For NEET Biology

Question 56. Population density of terrestrial organisms is measured in terms of individuals per:

  1. Metre
  2. Metre²
  3. Metre³
  4. Metre4

Answer: 2. Metre²

Question 57. Population density of aquatic organisms is expressed in terms of individuals per:

  1. Metre
  2. Metre²
  3. Metre³
  4. Metre4

Answer: 3. Metre³

Question 58. Which of the following factors is not a determinant of population size?

  1. Birth rate
  2. Immigration
  3. Emigration
  4. Migration.

Answer: 4. Migration.

Organisms and Populations Biology NEET Question 59. The dominant individual in a herd is

  1. Always a female
  2. Always a male
  3. Usually a male
  4. Usually a female

Answer: 3. Usually a male

Question 60. Tiger has a:

  1. Monogamous fixed partnership
  2. Patriarchy group
  3. Matriarchy group
  4. Solitary life

Answer: 2. Patriarchy group

Question 61. Which of these helps in the survival of a species?

  1. Group formation
  2. Maintenance of territory
  3. Communication
  4. All of the above.

Answer: 4. All of the above

Question 62. Honey bees perform dancing motions to signal:

  1. Distance of food source
  2. Direction of food source
  3. Availability of food
  4. Distance and direction of food source.

Answer: 4. Distance and direction of food source

Ecology MCQs For NEET

Question 63. Emigration affects the population in:

  1. Animals
  2. Land plants
  3. Animals and land plants
  4. Land plants and aquatic plants.

Answer: 1. Animals

Question 64. Brown-skinned human race:

  1. Mongoloid
  2. Polynesian
  3. Red Indian
  4. Australoid

Answer: 2. Polynesian

Question 65. The members or a form of polymorphic species:

  1. Interbreed with members in their own form
  2. Do not reproduce sexually
  3. Interbreed with members of other forms only
  4. Interbreed among themselves and with members of other forms also.

Answer: 4. Interbreed among themselves and with members of other forms also

Question 66. Cooperative interaction is essential for the perpetuation of:

  1. Animals
  2. Plants
  3. Both animals and plants
  4. Neither animals nor plants.

Answer: 3. Both animals and plants

Question 67. The aggregate of processes that determine the size and composition of any population is termed as:

  1. Population density
  2. Population explosion
  3. Population dispersal
  4. Population dynamics.

Answer: 4. Population dynamics

Question 68. When a tiger attacks cheetahs, the stag with the best antlers is surrounded by other individuals to protect it. It is an example of

  1. Cooperation
  2. Group formation
  3. Altruism
  4. Herding.

Answer: 3. Altruism

Question 69. Which of the following leads a solitary life?

  1. Swan
  2. Man
  3. Spider
  4. Monkey.

Answer: 3. Spider

Question 70. Family formation is a characteristic feature of:

  1. All animals
  2. A few animals
  3. Majority of animals
  4. Almost all animals.

Answer: 2. A few animals

Ecology MCQs For NEET

Question 71. Which among the following does not lead a monogamous life?

  1. Seal
  2. Fox
  3. Swan
  4. Wolf.

Answer: 1. Seal

Question 72. Rats are:

  1. Monogamous
  2. Bigamous
  3. Polygamous
  4. Do not have fixed partners

Answer: 4. Do not have fixed partners

Question 73. Ants communicate through:

  1. Sound
  2. Pheromones
  3. Contact
  4. Both (2) and (3)

Answer: 2. Pheromones

Question 74. Altruistic behavior is found in:

  1. Honey bee
  2. Termites
  3. Spotted deer
  4. All the above.

Answer: 4. All the above.

Ecology MCQs For NEET

Question 75. The factors which do not affect the population size is:

  1. Immigration
  2. Emigration
  3. Migration
  4. Birth rate.

Answer: 3. Migration

Question 76. The rapid decline in a population due to a high mortality rate is:

  1. Population density
  2. Population crash
  3. Population explosion
  4. All the above.

Answer: 2. Population crash

Question 77. According to the 1991 Census, the urban population of India was about:

  1. 30%
  2. 34%
  3. 51%
  4. 24%.

Answer: 4. 24%

Question 78. Genetically adapted population to a particular habit is:

  1. Mule
  2. Ecotype
  3. Ecosphere
  4. Ecology.

Answer: 1. Mule

Question 79. A fertile hybrid between the captive tiger and a lioness is:

  1. Mule
  2. Liger
  3. Tigress
  4. Tigon.

Answer: 4. Tigon.

Ecology MCQs For NEET

Question 80. Which of the following chemical compounds help in transmitting the message to other members of the same species?

  1. Hormone
  2. Ptyaiin
  3. Pheromones
  4. None of above.

Answer: 3. Pheromones

Question 81. The population tends to increase as individuals are added by:

  1. Natality
  2. Immigration
  3. None of the above
  4. Both of these.

Answer: 4. Both of these.

Question 82. The population tends to decrease by:

  1. Mortality
  2. Emigration
  3. None of these
  4. Both of these

Answer: 4. Both of these

Question 83. The most distinct and easily observation unit is:

  1. Cell
  2. Tissue
  3. Organs
  4. Individual organism.

Answer: 4. Individual organism.

Question 84. The occurrence of two forms among the organisms of the same kind is known as:

  1. Dimorphism
  2. Trimorphism
  3. Polymorphism
  4. None of the above.

Answer: 1. Dimorphism

Question 85. A green alga Volvox, a colonial form consists of over:

  1. 100 cells
  2. 1000 cells
  3. 10,000 cells
  4. 60,000 cells.

Answer: 4. 60,000 cells

Question 86. The chemicals of intraspecific communication are:

  1. Allochemics
  2. Kairomones
  3. Auxins
  4. Pheromones.

Answer: 4. Pheromones

Question 87. Human society is a product of:

  1. Instinctive behaviour
  2. Learnt behaviour
  3. Both (1) and (2)
  4. None of the above.

Answer: 2. Learnt behavior

Question 88. Match the terms in Column A with suitable terms in Column B.

  1. (1-c), (2-d), (3-a), (4-e); (5-b)
  2. (1-c), (2-d), (3—b), (4-e); (5-b)
  3. (1-c), (2-d), (3-a), (4-e); (5-b)
  4. (1-D), (2-c). (3-a), (4-e); (5-b).

Answer: 3. (1-c), (2-d), (3-a), (4-e); (5-b)

Question 89. Which of the following morphological forms is also known as ecophenes?

  1. Ecospecies
  2. Ecad
  3. Ecotype
  4. None of the above.

Answer: 3. Ecotype

Question 90. The relationship between one species and another within a community that has evolved through interactions is based upon:

  1. Requirement and mode of obtaining food only
  2. Requirement and mode of obtaining shelter only
  3. On the habits of the species only
  4. All of these.

Answer: 4. All of these.

Organisms And Populations NEET Questions

Question 91. The interaction among organisms in a community called as biotic factors influence:

  1. The structure of a community only
  2. Composition of a community only
  3. The function of a community only
  4. All of these.

Answer: 4. All of these.

Question 92. According to the species equilibrium theory, smaller islands have fewer species because they have:

  1. High rate of extinction
  2. Lower rate of colonization
  3. A smaller species pool to draw from
  4. Lower birth rates.

Answer: 1. High rate of extinction

Question 93. Competition between individuals of the species is called:

  1. Interspecific
  2. Intraspecific
  3. Feedback
  4. All of the above.

Answer: 2. Intraspecific

Question 94. Which of the following levels of organization emphasizes the structural aspects in terms of relation and requirement of organisms?

  1. Autecological level
  2. Synecological level
  3. Both (1) and (2)
  4. None of the above.

Answer: 1. Autecological level

Question 95. Synecology is the study of:

  1. Biosphere
  2. Individuals
  3. Environment
  4. Community in relation to the environment.

Answer: 4. Community in relation to environment.

Organisms And Populations NEET Questions

Question 96. The leaves are absent in the xerophyte:

  1. Calotropis procera
  2. Zizyphus jujube
  3. Acacia nilotica
  4. Cippciris aphylla.

Answer: 4. Cippciris aphylla

Question 97. The relationship between one species and another within a community that has evolved through interactions is based upon:

  1. Requirement and mode of obtaining food only
  2. Requirement and mode of obtaining shelter only
  3. On the habits of the species only
  4. All of the above.

Answer: 4. All of the above.

Organisms And Populations NEET Questions

Question 98. The interaction among organisms in a community called as biotic factors influence:

  1. The structure of a community only
  2. Composition of a community only
  3. The function of a community only
  4. All of the above.

Answer: 3. Function of a community only

Question 99. The scientific study of mimicry was carried out first by:

  1. Darwin
  2. Bates
  3. Muller
  4. Von Frich.

Answer: 2. Bates

Question 100. A butterfly of India when resting with folded wings resembles a dead leaf. This mechanism of protection is called:

  1. Mimicry
  2. Hiding
  3. Congregation
  4. Camouflage.

Answer: 1. Mimicry

NEET Important Questions On Ecology

Question 101. A stick insect (Carausium) mimics a thin dry branch and a dead leaf or an oak leaf butterfly (Kallima) looks like a dead leaf. It is:

  1. Concealing protective mimicry
  2. Warning mimicry
  3. Concealing aggressive mimicry
  4. Warning alluring mimicry.

Answer: 1. Concealing protective mimicry

Question 102. The mimetic imitates other organism in:

  1. Shape and size
  2. Color
  3. Action and attitude
  4. Any of the above.

Answer: 3. Action and attitude

Question 103. Types of aggressive mimicry are

  1. Concealment type
  2. Alluring type
  3. Warning type
  4. Both (1) and (2).

Answer: 4. Both (1) and (2).

Question 104. The first scientific account of mimicry was given by:

  1. Bates
  2. Darwin
  3. Raunkier
  4. Haeckel.

Answer: 1. Bates

Question 105. Which one is not an example of concealing protective mimicry?

  1. Sea Dragons (Phyllopteryx) resemble seaweeds
  2. The Geometrid moth’s caterpillar resembles small branches.
  3. The praying mantis looks like branches
  4. Leaf insect (Phyllium) looks like a green leaf.

Answer: 3. Praying mantis looks like branches

Question 106. The palatable viceroy butterfly (Limenitis archippus) resembles a distasteful monarch butterfly (Doncisus plexippus) for its protection. This is called:

  1. Aggressive Mimicry
  2. Warning Mimicry
  3. Concealing Mimicry
  4. Alluring Mimicry.

Answer: 2. Warning Mimicry

NEET Important Questions On Ecology

Question 107. When a predator (mimic) remains hidden from prey to catch it suddenly as in praying mantis, it shows:

  1. Concealing aggressive mimicry
  2. Concealing protective mimicry
  3. Warning mimicry
  4. Alluring mimicry.

Answer: 1. Concealing aggressive mimicry

Organisms and Populations NEET Questions Question 108. When the mimic attracts its prey, it is called:

  1. Warning mimicry
  2. Alluring mimicry
  3. Protective coloration
  4. Camouflage.

Answer: 2. Alluring mimicry

Question 109. When a palatable female butterfly (for example, a Viceroy butterfly) copies an unpalatable species (Monarch butterfly) the type of adaptation is called:

  1. Batesian mimicry
  2. Mullerian mimicry
  3. Cryptic adaptation
  4. Warning coloration.

Answer: 1. Batesian mimicry

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