Fill in the blanks with appropriate words

Onion root tips are suitable material for studying

Magnification of a microscope fitted with a 5x objective and a 6x eyepiece is

Basic dyes are charged.

Coplin jars are used for

Give one word for the following statements:

The instrument used for cutting of plant and animal materials.

Preparation used for soft tissues such as root tips.

Mark the following statements as True or

Pressure cooker is used for wet sterilisation.

100% HgCl2 is a good preservative against insects.

Newspapers can be used in place of blotting papers for drying of plants.

Cover-slips are manufactured from very thin glass sheet.

Match the entities given in Column A with those given in Column B


ColumnA ColumnB

Kymograph (1) Earthworm

Annelida (2) Live specimens

Phase contrast microscope Intensity of microscope coloured solution

Mordant (4) Recording of muscle twitch

Colorimeter (5) Potash Alum

2. Attempt any five questions. Limit your answers to 50 -60 words each.

Explain the use of autoclave. Illustrate your answer.

Explain the maintenance and preservation of microbial cultures.

Differentiate between an aquarium and a vivarium.

Describe the procedure for cleaning the used slides.

List the different parts of the distillation unit with a suitable diagram.

State two differences between the following pairs:

Coelenterata and Platyhelminthes

Bryophyta and Pteridophyta

3. Explain in detail the methods of collection and pressing of plants.

OR

Explain the different types of fixatives and their uses in tissue preparation.