Organisms and Populations — BIOLOGY STD 12 Science — Question

Name the gas released and the process responsible for puffing up of the bread dough when Saccharomyces cereviseae is added to it.

OR

Name the metabolic pathway associated with the rising of dough in making bread. What makes the dough rise?

What would happen to the immune system, if thymus gland is removed from the body of a person?

How can a woman, incapable of producing an ovum can become a mother?

What do you understand by the semiconservative replication of DNA?

Name the cellular genes which when activated can cause cancer.

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?

What is the function of statins produced from Monascus purpureus yeast?

How many pollen grains and ovules are likely to be formed in the anther and the ovary of an angiosperm bearing 25 microspore mother cells and 25 megaspore mother cells respectively?

Tell the name of the scientist who opposed the theory of spontaneous generation?

Fill in the blanks.

The major reservoir of carbon on earth is ________.