Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

What is the function of Leydig cells?

What is genetic code? How did genetic code came into existence ?

In the table given below, select and enter one correct device out of the following: Oral pill, Condom, Copper T, Saheli, Vasectomy, Diaphragm, Tubectomy, Cervical cap

S.No.	Method of Birth Control	Device
1	Barrier
2	IUD
3	Surgical Technique
4	Administering Hormones

The present population growth rate in India is alarming. Suggest ways to check it.

Bee keeping practice is a good income generating industry. Write the different points to be kept in mind for successful bee keeping. Write the scientific name of the most common Indian species used for the purpose.

i. How does mutation occur?
ii. Differentiate between point mutation and frameshift mutation.

Co-evolution is a spectacular example of mutualism between an animal and a plant. Describe co-evolution with the help of an example.

'Fertilisation is not an obligatory event for fruit production in certains plants'. Explain the statement.

Explain Predation

Do you agree that regional and local variations exist within each biome? Substantiate your answer with suitable example.