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The plant species' ranges in the northern hemisphere may move northward due to global warming. This...

The plant species' ranges in the northern hemisphere may move northward due to global warming. This is determined by:

a) simultaneous migration of herbivores

b) salinity tolerance

c) seed dispersion success

d) size

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Answer #1

Ans. (C) seed dispersion success

Explaination: Due to global warming, there is rise in temperature. This rise in temperature affects the distribution of plant species because the optimum temperature for growth, development and reproduction may become unsuitable for the plant species. As a result of this, the plant species find more success in reproduction rate thereby increasing the survival rate. The seeds dispersed are able to grow successfully in the northward region i.e. towards pole. Polar region is characterized by low temperature and hence rise in temperature makes a shift of plant species northwards to have a comparatively low temperature optimum for growth and survival.

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