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Q. Is the epithelium vascularized? How do oxygen and nutrients reach the epithelium? Why is this feature an important evolutionary acquisition?
Epithelia are not vascularized capillaries don't directly reach their cells the epithelium exchanges substances by diffusion with the connective tissue situated under it.
Since the epithelia are not vascularized minuscule scratches or skin injuries that happen all the time do not trigger bleeding and do not expose the blood to contamination from external agents this is an important protective strategy discovered by evolution.
Why acquired traits are not directly related to the process of evolution? As acquired traits are not genetically determined, they cannot be passed on to offspring. Therefore,
Define the working of Cyclomixer? This is an electrical mixer used for mixing the contents of a test tube. The speed of the mixer can be adjusted to your requirement. This is a
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HIS T O R Y - Protoplasm was first seen by Corti, 1772 F . Dujardin called it "Sarcode" & observed it in animal cell Term "Protoplasm" was given by J.E. Pu
1. What are the examples of helobial endosperm
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Define Plasma or serum ascorbic acid levels? The serum or plasma ascorbic acid levels are used as an index of ascorbic acid nutrition of humans. The normal serum values vary ov
AUTOTROPHI C NUTRITION Preparation of organic food from the inorganic materials in the living body. May be photoautrophic, e.g. Euglena virdisima. May be chemo
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