Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

31.

A high density of elephant population in an area can result in

  • Mutualism

  • Intraspecific competition

  • Interspecific competition

  • Interspecific competition

282 Views

32.

How does pruning help in making the hedge dense?

  • It induces the differentiation of new shoots from the rootstock

  • It frees axillary buds from apical dominance

  • The apical shoot grows faster after pruning

  • The apical shoot grows faster after pruning

548 Views

33.

Praying mentis is a good example of

  • Mullerian mimicry

  • Warning colouration

  • Social insects

  • Social insects

966 Views

34.

Niche overlap indicates

  • active cooperation between two species

  • two different parasites on the same host

  • sharing of one or more resources between the two species

  • sharing of one or more resources between the two species

645 Views

Advertisement
Advertisement

35.

Annual migration does not occur in the case of

  • salmon

  • siberian crane

  • salamander

  • salamander


C.

salamander

Salamonder is semiterrestrial lizard-like tailed amphibian lives under stones, logs and inside crevices. They show hibernation.
Salmon anadromous i.e., they spend their adult lives at sea but return to fresh water to spawn.  The pacific species is legendary after migrating downstream as a smolt a sockeye salmon ranges many hundreds of miles over the pacific for nearly four year and than returns to spawn in the head waters of its parent stream.
Migration tern travels about 1100 miles during winter and return back during summer.

484 Views

Advertisement
36.

Mycorrhizae are the example of

  • Fungistasis

  • Amensalism

  • Antibiosis

  • Antibiosis

785 Views

37.

Asymptote in a logistic growth curve is obtained when

  • The value of 'r' approaches zero

  • K = N

  • K > N

  • K > N

3140 Views

38.

Alexander Von Humbolt described for the first time

  • Ecological Biodiversity

  • Laws of limiting factor

  • Species area relationships

  • Species area relationships

1218 Views

Advertisement
39.

The amnion of mammalian embryo is derived from

  • ectoderm and mesoderm

  • endoderm and mesoderm

  • ectoderm and endoderm

  • mesoderm and trophoblast


40.

In a growing population of a country,

  • pre-reproductive individuals are more than the reproductive individuals

  • reproductive individuals are less than the post-reproductive individuals.

  • pre-reproductive individuals are less than the reproductive individuals.

  • reproductive and pre-reproductive individuals are equal in number.


Advertisement