Biology : Human Health and Disease

 What are interferons ? Mention their role.

Name the causative organism of the disease amoebiasis. List three symptoms of the disease.

Prior to a sports event blood and urine samples of sports-persons are collected for drug tests.
(a) Why is there a need to conduct such tests/
(b) Name the drugs the authorities usually look for.
(c) Write the generic names of two plants from which these drugs are obtained.

Differentiate between benign and malignant tumors.

(i) Write the scientific names of the two species of filarial worms causing filariasis.

(ii) How do they affect the body of infected person(s)?

(iii) How does the disease spread?

Suggest a method to ensure an anamnestic response in humans.

What is biopiracy?

A mature embryo sac in a flowering plant may possess 7-cells, but 8-nuclei. Explain with the help of a diagram only.

Mention the evolutionary significance of the following organisms:

In an agricultural field, there is a prevalence of the following organisms and crop diseases which are affecting the crop yield badly:
(a) White rust (b) Leaf and stripe rust
(c) Black rot (d) Jussids
Recommend the varieties of crops the farmers should grow to get rid of the existing problem and thus, improve the crop yield.