Why and how did biodiversity evolve on the earth?

Question

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Answer

There is great diversity with respect to size from microscopic to macroscopic, shape, colour, form, mode of nutrition, type of habitat, reproduction, motility, duration of life cycle span, etc.
This diversity evolved in living beings for surviving and perpetuating to accommodate with different environmental conditions such as climatic, edaphic, topographic, geographic, etc. and different situations.
For achieving this, living organisms adapted to different conditions and various habitats.
This lead in formation of different features which lead to diversity in them.
These adaptations in different environments serve as basis for diversity.

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Cells	Functions
(1) T-lymphocytes	(a) Phagocytic in function
(2) Neutrophils	(b) Responsible for Humoral immunity
(3) Eosinophils/Acidophils	(c) Responsible for cell-medicated immunity
(4) B-lymphocytes	(d) Anti-allergic [Antihistamine] in function

Cardiovascular disorders	Symptom
Coronary Artery Diseases (CAD)	Deposition of calcium, fat, cholesterol and ———————
—————-	Pain in chest resulting from reduction in the blood supply to the cardiac muscles.
Silent Heart Attack	Myocardial infarction without ———————-