OBJECTIVE QUESTION BASED ON SPECIES AND POPULATION ECOLOGY

1. Allopatric speciation occurs when 

(a) genetically unrelated populations inhabit the geographical area

(b) genetically related populations same geographical area

(c)genetically unrelated populations inhabit widely separated geographical area

(d) genetically related populations inhabit widely separated geographical areas.

                                                                       

                                                      

2.  2. Asymptote is the stage when a population is

(a) Stabilised

(c) Increasing

(b) Changing

(d) Decreasing                                                     

3. In the exponential phase, the sequence of events in bacterial multiplication is

(a) stationary, lag, log, decline

(b) stationary, log, lag, decline

(c) lag, log, decline, stationary 

(d) decline, log, lag, stationary

4. 4. Two species cannot occupy the same niche. The law is

(a) Wein Law

(b) Allen Law

(c) Gause Law

(d) Competition Exclusion Principle

5. Analysis of human population on the basis of statistics is

(a) biometry

(b) biostatistics

(c) both above

(d) exobiology

6. A new species can be developed by 

(a)mutation and isolation

(b) isolation and competition

(c) mutation and competition

(d) variation and competition 

7. In a population there is more dominance of young people. This population is

(a) expanding

(b) declining

(c) stable

(d) both a and space

8.  Severe competition for food, shelter is maximum in

(a) Closely related species occupying the same niche

(b) Closely related species occupying the different niche 

(c) Distantly related species occupying the same habitat 

(d) Distantly related species occupying the different habitat

8.  11th July is 

(a) World Population Day

(b) World food day

(c) World Environment Day 

(d) World Health Day

9. Group of organisms of the same species in a given area at a particular time is called as

(a) Community 

(b) Ecosystem 

(c) Population

(d) Biosphere

10. The permanent decrease in population number in population occurs due to

(a) mortality

(c) territoriality

(b) natality and migration

(d) emigration

11. The factor involved in the formation of new species are 

(a) competition and variations

(b) isolation and mutation

(c) interspecific competiton only

(d) intraspecific competition only

12. Copper-T acts by 

(a) suppression of fertilization by forming a membrane

(b) disturbing the site of implantation of oocyst

(c) acting as a barrier

(d) none above

13. If in any given population progeny is less adapted than its ancestors, it is due to

(a) migration 

(b) genetic drift

(c) mutation 

(d) gene flow

14  First population explosion occurred due to

(a) agriculture 

(b) industrialization

(c) modernization

(d) change in culture

15. The human race with raised cheekbones and obliquely placed eyes is

(a) bushman (c) polynesian

(b) mongoloid (d) australoid

16. In a population if the number of immigrated people are more than the number of emigrated

and the death of people is low then in the growth curve the phase is

(a) decline phase (c) steady phase

(b) exponential phase (d) lag phase

17. Afforestation with regard to urban development is called 

(a) Social forestry

(b) Integrated Forest Management 

(c) both above

(d) none above

18. The gene pool of a population tends to remain stable if certain conditions are met. These 

conditions include large populations, no mutation, no migration and 

(a) random mating

(b) natural selection

(c) reduction of predators

(d) moderate environmental changes

19. Dominant organisms found on earth nowadays are

(a) herbivores

(b) rodents

(c) carnivores

(d) marine mammals.

20.  Population I and II are growing in the same habitat and are morphologically similar but

these are intersterile. In terms of 'Biological Species Concept' they may be considered

(a) one species

(b) two distinct species

(c) two sibling species 

(d) none of these

21.  Darwin's finches provide evidence and support regarding 

(a) anatomy

(b) biogeography 

(c) both of these

(d) none of these

22. . What will form a new species out of the following?

(a) Differential reproduction

(b) Inbreeding

(c) Variations

(d) None above.

23 Species occurring in different geographical areas are called as

 

(a) neopatric

(b) sympatric

(c) sibling

(d) allopatric.

24. The force opposing the ability to reproduce a given rate in any population is 

(a) mortality

(b) fecundity 

(c) environmental resistance

(d) biotic control. 

25. Two species of mice will be called congenic if they are

(a) genetically identical 

(b) genetically nonidentical except at one locus

(c) genetically nonidentical one locus

(d) genetically identical except at one locus.

26. Diversity in the type of beaks of finches adapted to different feeding habits on the

Galapagos islands, as observed by Darwin, provides evidence for 

(a) origin of species by natural selection

(b) intraspecific variations

(c) intraspecific competition

(d) interspecific competition. 

27.  The hexaploid wheat is obtained by

(a) hybridomas

(b) coupling of chromosomes

(c) hybridization and coupling of chromosomes

(d) only hybridization.

 

28. Ratio of natality and mortality of a population expressed in percentage is

(a) vital index 

(b) survival rate

(c) growth rate

(d) biotic potential.

 

29. A force that checks the achievement of the highest possible level of population of world

growth is the mother

(a) population pressure

(b) saturation level 

(c) immigration

(d) none above.

30.One of the following controls the population from going beyond its limits

(a) carrying capacity

(b) environmental resistance

 (c) family planning program 

(d) shortage of food supply.

31. The most important factor for the success of any animal population is 

(a) natality

(b) unlimited food

(c) adaptability

(d) interspecies activity. 

32. If the rate of addition of new members increases with respect to the individual lost

of the same population, then the graph obtained has 

(a) declined growth

(b) exponential growth

(c) zero population growth 

(d) none above.

33. The population density can be calculated by

(a) D = S/N

(b) D = S/W

(c) D = N/S

(d) D = W/S.

34. In any growing population the most contribution is of

(a) post-reproductive members

(b) reproductive members 

(c) pre-reproductive members

(d) all above.

35. The human population can be truly called civilized in a large measure on

(a) their ability of humanity to moderate its fecundity

(b) in increasing the food population

(c) colonization of under populated areas 

(d) combating human diseases.

36. Who said that population would exceed the resources?

(a) Oparin theory

(b) Malthus theory

(c) Darwin theory 

(d) Theory of Lamarck.