Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

1. Name the lymphoid organ in human, where all the blood cells are produced.
2. Where do the lymphocytes produced by the lymphoid organ mentioned above, migrate and how do they effect immunity?

List the changes that the primary ooctye undergoes in the tertiary follicular stage in the human ovary.

Mention the importance of Lactic acid bacteria to humans other than setting milk into curd.

What advantage does the sea anemone get in the sea anemone-hermit crab interaction as facultative mutualism? Give an alternative term for this kind of mutualism.

Suggest the aspects of reproductive health which need to be given special attention in the present scenario.

What is point mutation? Give one example.

Explain the significance of biodiversity in modern time.

What is golden rice? Search on internet.

After a brief medical examination, a healthy couple came to know that both of them are unable to produce functional gametes and should look for an 'ART' (Assisted Reproductive Technique). Name the 'ART' and the procedure involved that you can suggest to them to help them bear a child.

Identify A, B, C and D in the following table:

Scientific name of the source plant	Drug	Harmful effects/ Human body part affected
Papaver somniferum	A	Depressant/ slows body functions
Cannabis sativa	Cannabinoids	B
Erythroxylon coca	C	D