Back pain is mainly caused by: (a) lack of physical activity (b) Excessive smoking (c) Lack of flexibility (d) all of these

Placing a ripe apple in a bag of green bananas will cause them to ripen quickly. This occurs because the apple (a) absorbs cytokinin (b) forms digestive enzymes (c) lacks auxin (d) produces ethylene

Absence of fish along a river indicates (a) Zone of degradation (b) Zone of active decomposition (c) All zones of pollution (d) Zone of recovery

The function of the secretion of prostate gland is: (a.) Inhibit sperm activity (b.) Attract sperms (c.)Stimulate sperm activity (d.)None of these

Which of the following statement(s) is (are) incorrect reason for eutrophication ? (A) excess usage of fertilisers (B) excess usage of detergents (C ) dense plant population in water bodies (D) lack of nutrients in water bodies that prevent plant growth Choose the most appropriate answer from the options given below:

In the given sentence, identify the segment which contains the grammatical error. People with full time sedentary jobs who commuting long distances, may have sleep problems due to lack of exercise. (a) due to lack of exercise (b) may have sleep problems (c) People with full time sedentary jobs (d) who commuting long distances

(i) Match the following column with correct answer (ii) High blood pressure can be caused by excessive weight and lack of exercise. Justify the statement.

A, B and C are three common STDs. A and C are caused by bacteria whereas B is caused by a virus D. The virus D reduces the immunity of the infected person to such a low level that the person can die of even very mild diseases. How can A, B and C be caused ?