Organisms and Populations — BIOLOGY STD 12 Science — Question

How are tobacco plants benefitted when nematode specific genes are introduced into them using certain vectors? Name the vector used.

Name the two enzymes that are essential for constructing a recombinant DNA.

What is the site of megasporogenesis?

Diseases are broadly classified as infectious and non infectious diseases. Pick out the non-infectioius diseases from the following list: Cancer, Measles, Diphtheria, Allergy.

Give two examples of passive immunity.

Mention the function of mitochondria in sperm.

Name the kind of cheese, which possesses characteristic holes.

What is the end of menstrual cycle in a 50 years old woman called?

It was diagnosed by a specialist that the immune system of the body of a patient has been suppressed. Name the disease the patient has been suffering from and its causative agent.

Which chromosomes are called autosomes?