Organisms and Populations Important Questions | Multiple Choice Questions on Population

1. The relationship between species and another within community that has evolved through interaction is based upon

(a) requirement and mode of obtaining food only

(b) requirement and mode of obtaining shelter only

(c) on the habits of the species only

(d) All of the above

Ans. d

2. Communities that exist in the aphotic zone ultimately depend on food manufactured by the chemoautotrophic bacteria or

(a) algae and cyanobacteria that also live in the aphotic zone

(b) algae and cyanobacteria that live in the photic zone

(c) decomposers

(d) minerals found on the ocean bottom

Ans. b

3. An association of different inter-related populations belonging to different species in common environment. which can survive in nature is called

(a) herd

(b) family

(c) population

(d) community

Ans. d

4. Why is a new island more hospitable to the colonisers than an older island?

(a) Competition is more intense on the newer island

(b) Predation is loss of a factor on older islands

(c) The extinction rate is higher on the newer island

(d) The intensity of both competition and predation is less on the newer island

Ans. d

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5. Which of the following is an omnivore?

(a) Man

(b) Crow

(c) Both (a) and (b)

(d) Rat

Ans. c

6. Humans who have pets are healthier than humans, who do not have pets, which of these terms applies to the relationship between a human and a pet?

(a) Competition 

(b) Parasitism

(c) Commensalism

(d) Mutualism

Ans. d

7. When the carrying capacity is equal to the population size, the net rate of increase in the population is equal to

(a) the carrying capacity

(b) less than zero

(c) the intrinsic rate of growth

(d) zero

Ans. d

8. The parasite, which come in contact with host for only a part of their life or occasionally at the time of feeding are called intermittent parasites. Which of the following is not an intermittent parasite?

(a) Leech 

(b) Bed bug

(c) Female mosquito

(d) Ascaris

Ans. d

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9. The animal, which captures and feeds on other animals is called

(a) predator 

(b) prey

(c) parasite

(d) host

Ans. a

10. In world populations, individuals most often show a . pattern of dispersion.

(a) random 

(b) density-dependent

(c) equilibrium

(d) clumped

Ans. d

11. Which of the following plants is not a predator plant?  

(a) Hydrilla

(b) Drosera

(c) Utricularia

(d) Dionaea

Ans. a

12. The sum total of the populations of the same kind of organisms constitute

(a) colony 

(b) genus

(c) community

(d) species

Ans. d

13. Intracellular endoparasite is

(a) Trichinella

(b) Plasmodium 

(c) Trypanosoma

(d) Ascaris

Ans. b

14. A synthetic character of biotic community is

(a) fidelity 

(b) dominance

(c) physiogamy

(d) All of these

Ans. d

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15. Which one is a qualitative character?

(a) Abundance

(b) Frequency 

(c) Biomass

(d) Phenology

Ans. d

16. A climax community is recognised by

(a) grasses, herbs and shrubs

(b) trees

(c) high biomass

(d) uniform composition

Ans. b

17. The phenomenon of having higher number of species in ecotone is called

(a) edge effect 

(b) abundance

(c) frequency

(d) dominance effect

Ans. a

18. Wuchereria is a

(a) ectoparasite of man

(b) endoparasite of man

(c) predator of animals

(d) parasite of dog

Ans. b

19. What relationship persist between birds and cattle?

(a) Commensal 

(b) Predator

(c) Protocooperation

(d) Mutualism

Ans. c

20. Female Anopheles visit the host for sucking blood at intervals. The type of parasitism is

(a) hemiparasite 

(b) endoparasite

(c) holoparasite

(d) intermittent parasite

Ans. d

21. The type of relationship between sea anemone and hermit crab is

(a) commensalism

(b) mutualism 

(c) symbiosis

(d) parasitism

Ans. b

22. Territory is defended against

(a) predator  

(b) any intruder

(c) intruder of another species

(d) intruder of same species

Ans. b

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23. Mycorrhiza, an association of fungus and angiospermic root is referred as

(a) ammensalism

(b) mutualism 

(c) parasitism

(d) commensalism

Ans. b

24. The non-obligatory mutually beneficial relationship is represented by

(a) symbiosis 

(b) protocooperation

(c) commensalism

(d) mimicry

Ans. b

25. Species interaction with negative influence on both is called

(a) predation 

(b) parasitism

(c) ammensalism

(d) competition

Ans. d

26. An association of two species in which both species are benefitted is called

(a) protocooperation 

(b) mutualism

(c) ammensalism

(d) All of these

Ans. b

27. Lichen is a symbiotic association of algae with

(a) protozoan 

(b) fungi

(c) roots of plants

(d) bacteria

Ans. b

28. In aquatic mammals, a blubber is present

(a) in the skin

(b) around the different organs

(c) in the muscles

(d) in the connective tissue

Ans. d

29. The interdependent evolution of flowering plants and pollinating insects together is known as

(a) mutualism 

(b) cooperation

(c) commensalism

(d) co-evolution

Ans. d

30. Exotic species sometimes become serious pest because of

(a) better environmental conditions in new locality

(b) better adaptability to new environment

(c) increase in reproductive potential

(d) the absence of natural competition

Ans. d