Multiple Choice Questions

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Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example

  • enlargement of body size by swallowing air in puffer fish

  • melanism in moths

  • poison fangs in snakes

  • colour change in chameleon


C.

poison fangs in snakes

Animals resist predation by cryptic colouration, deceptive marking, behavioural defenses and the possession of mechanical or chemical defenses.
Example : 1. Enlargement of body size by swallowing air in puffer fish.
2. Melanism in moths.
3. Colour change in chameleon.


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Decomposers are

  • autotrophs

  • autoheterotrophs

  • organotrophs

  • heterotrophs


What is the main cause for the extinction of some species in tropical forest?

  • Deforestation

  • Afforestation

  • Pollution

  • Soil erosion


Biological concept of species is mainly based on

  • reproductive isolation

  • morphological features only

  • methods of reproduction only

  • morphology and methods of reproduction


Species can be identified on the basis of

  • interbreed

  • species diversity

  • reproductive isolation

  • None of the above


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According to IUCN red list what is the status of red Panda (Athurus fulgens)?

  • Vulnerable species

  • Critically endangered species

  • Extinct species

  • Endangered species


The plant that is characteristics component of mangrove vegetation

  • Rhizophora mangel

  • Ficus religiosa

  • Mangifera indica

  • Prosopis specigera


Biodiversity act of India was passed by the Parliament in the year

  • 1996

  • 1992

  • 2002

  • 2000


The species, which is going to become extinct due to lack of proper care would be called

  • rare

  • endangered

  • vulnerable

  • extinct


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One of the following statements is incorrect with reference to biodiversity. Identify it.

  • The areas with very few plant and animal species (low species richness) with no threatened species are called biodiversity hotspots.

  • Biodiversity increases from higher altitudes to lower altitudes

  • Biodiversity decreases from the equator to polar regions

  • Depletion in genetic diversity of crop plants is mainly due to the introduction of better varieties with high yield, disease resistance, etc.


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