Question

Why onion peel is kept in glycerine and covered by cover slip

Answer 1

Explanation:

We use glycerin for mounting the onion peel for the following reasons: ... As the refractive index of glycerin is 1.473 and it it tends to reflect ,light so the specimen kept looks clear under the microscope. 4. Glycerin is also used to expel air bubbles which can be found between slides

Answer 2

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Glycerine prevents the onion peel from drying up by cutting contact from the atmosphere while coverslip prevents the lens of the microscope to come in contact with the specimen...

When kept in hypotonic solution the RBCs burst easily because they are animalcells and do not possess cell wall, while the RBC burst when kept in onion peelpossess cell wall which makes it resistant to the bursting due to swelling caused by endosmosis.

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Hope it helps... ¯\_(ツ)_/¯