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12th Standard English Medium Biology (Botany) Subject Principles of Ecology Creative 2 Mark Questions with Solution Part - I

Published on: 22/06/2021

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Std: 12th Standard - Biology

chapter: - Creative Questions

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Questions:

Generic 2

5 x 2 = 10

Give an example for following type of adaptations.
(a) Phyllode
(b) Cladode

What are hemiparasites? Give example

What is the principle of commensalism?

Name any two positive interactions with an example for each.

What is ecological hierarchy?

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Answers Key:

Generic 2

5 x 2 = 10

(a) Phyllode - E.g: Acacia.
(b) Cladode - E.g: Asparagus

Hemiparasites is the organisms which derive only water and minerals from their host plant while synthesizing their own food by photosynthesis are called Hemiparasites. They are also called partial parasites.
Example: Viscum.

Commensalism is an interaction between two organisms in which one is benefitted and the other is neither benefitted nor harmed. The species that derives benefit is called the commensal, while the other species is called the host.

(a) Mutualism - E.g: Lichen
(b) Commensalism - E.g: Orchids.

The interaction of organisms with their environment results in the establishment of grouping of organisms which is called ecological hierarchy.