Short Answer Type

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Answer the following :

Why is the shape of the right lung slightly different from that of the left lung ?


The right lung has three lobes and is larger than the left lung which has two lobes. This is to accommodate the heart which lies on the left side. Thus, the shape of the right lung is slightly different than the left lung.
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Give reasons for the following :

Growth of long bones is bi-directional

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Answer the following :

Name the gene of a cancer causing virus responsible for transformation.

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Answer the following :

What is phylogeny ?

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Answer the following :

Name the vessel which supplies blood to the heart muscles.

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Explain briefly :

Quiescent Centre

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Explain briefly :

Photophosphorylation

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Give reasons for the following :

Short day plants are called long night plants.

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Explain briefly :

Autotomy

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Answer the following :

Which hormone keeps leaves green for a longer time ?

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