Discuss the role of following with reference to immunity :Antibodies.

Discuss the role of following with reference to immunity : Phagocytes.

Discuss the role of following with reference to immunity : Interferons.

Discuss the role of following with reference to immunity : Helper-T cells.

Explain the role of following hormones ,with reference to menstrual cycle: Estrogen,

Explain the role of following hormones ,with reference to menstrual cycle: FSH,

Explain the role of following hormone ,with reference to menstrual cycle: LH,

Plant breeding deals with the development of better suited, high yielding and disease-resistant plant species. Discuss the role of following in achieving the aim of plant breeding.

What is role of following in providing immunity? Interferons.

Discuss the role of bile in digestion of food.