Tissues — Science STD 9 — Question

Ozone hole over Antarctica appears during:

1. Spring.
2. Summer.
3. Autumn.
4. Winter.

Dutrochet has given the concept about cell in:

Swollen feets and ankle can be naturally cured by dipping them in salt water. Suggest the mechanism involved in this treatment.

In desert plants, rate of water loss gets reduced due to the presence of:

The idea ‘omins cellula e cellula’ which means that all living cells arise from preecisting cells was given by:

Trapped dust particles are pushed out of respiratory tract by:

1. Ciliated epithelium.
2. Stratified epithelium.
3. Sensory epithelium.
4. Glandular epithelium.

Which of the following plant group bears naked seeds?

1. Pteridophyta.
2. Bryophyta.
3. Gymnospermae.
4. Angiospermae.

.......... are involved in intracellular digestion?

Cuboidal tissue takes part in:

1. Absorption.
2. Secretion.
3. Excretion.
4. All the above.

_________ is necessary for the maximum and judicious use of water: