Model Paper 4 — BIOLOGY STD 12 Science — Question

Write the scientific name of the plant on which Taylor et al performed their experiments.

Mention two causes of frame-shift Mutation.

Identify True/ False statements. Correct each false statement to make it true.
Menstrual cycle ceases during pregnancy. (True/ False)

Write a difference between net primary productivity and gross primary productivity.

OR

How is net primary productivity different from gross primary productivity?

Which law of inheritance of Mendel is universally acceptable and without any exception? State the law.

Give one reason for adding blue-green algae to the agricultural field.

How do we compute the age of a rock?

Write two anti cancer medicines obtained from the Madagascar periwinkle plants.

Name the important steps in the process of decomposition.

What is clitoris?