8. Some steps in preparing a plant section for microscopic observation are given below. a) Keep the specimen in water for a while. b) Add glycerine to the section. Give reasons for the above actions.
Answers
Answer:
To observe the cells in an onion peel, we prepare a slide by adding Glycerin as a mounting agent to the onion peel specimen. Glycerin prevents the drying up of specimen and also helps in getting a clear picture under the microscopic lens. Apart from that, Glycerin also protects the specimen from dust and damage along with preserving the cellular characteristics of the specimen as well as the quality of the stain. Most of these benefits are attributed to the chemical stability of Glycerin.
Answer:
The major reason for the following are;
a) It is kept in water for a specified time so as to study its movements under the microscope clearly in the water.
b) Glycerin provides a very protective layer to the specimen preventing it from any kind of dryness.
Explanation:
Some of the major steps in preparing a plant section for our microscopic observation are very important. The major reasons for the two above given steps are as follows:
a) The specimen to be studied is first kept in water for a while so that we can clearly observe its movements in the water and also wet medium facilities the locomotory actions of the specimen and help us to clearly observe it.
b) The specimen is then covered with a coverslip after the addition of glycerine so that our specimen doesn't dry while the time we prepare for our observation. It also facilitates the prevention of entrance of any kind of dust or foreign particle in our specimen, it makes a shield layer outside the surface of our specimen so that we can observe only the desired organism and not any other foreign particle.