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The Living World — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYThe Living World3 Marks
Question
A plant species shows several morphological variations in response to altitudinal gradient. When grown under similar conditions of growth, the morphological variations disappear and all the variants have common morphology. What are these variants called?
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Answer

Such plants variants are known as Biotypes. All the biotypes are similar genetically but are different morphologically. The difference in the morphology is due to the abiotic factors like temperature, soil quality, climate, water availability etc. The difference in the abiotic conditions is due to the altitudinal gradient. Therefore the plant species show differences in morphology due to the altitude gradient. 
When these plants are grown in similar conditions, there is no difference in the abiotic factors and hence all are similar in morphology. 

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