Human Reproduction — BIOLOGY STD 12 Science — Question

State the functions of acrosome.

Define asexual reproduction. Write two examples of vegetative propagation in flowering plants.

Why is the possibility of a human female suffering from haemophilia rare? Explain.

In the North East region of India, during the process of jhum cultivation, forests are cleared by burning and left for regrowth after a year of cultivation. How would you explain the regrowth of forest in ecological term?

When does ovulation occur?

Describe the responsibility of GEAC, set up by the Indian Government.

How are oncogenic viruses different from proto oncogenes?

How are the consecutive nucleotides linked together in a polynucleotide strands?

Differentiate between Down's syndrome and Turner's syndrome.

Heat loss or heat gain depends upon the surface area of the organism's body. Explain with the help of a suitable example.
OR
Explain, why are small animals rarely found in the polar regions?