Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Protonema stage is found in which type of plants?

List the hormones secreted by the following:
Testis.

Vinay was going through an industrial area with his grandfather. While on the way, he felt suffocated and dizzy due to the smoke coming out of the factory. Vinay got angry and started shouting that all these factories should be closed. His grandfather calms him down and explained that it is due to large scale cutting of trees for urbanization and industrialization which has disturbed the balance of atmospheric gases. He also explained various economic importance of plants.

1. Large scale cutting of trees leads to ___________________?
2. What initiatives should be taken to maintain the atmospheric balance.
3. Give various economic importance of plants.
4. What values are shown by his grandfather?

Which qualities decrease as we move from species to kingdom in the hierarchy?

What structures are both lobes of the thyroid gland connected to?

Why do we feel giddiness after a ride on the merry-go-round?

What is the number of ovules in a pea?

List the hormones secreted by the following:
Thyroid.

We commonly call ATP as the energy currency of the cell. Can you think of some other energy carriers present in a cell? Name any two.

Name two groups of animals, whose ventricle pumps mixed blood.