The persons with age group 15-24 years are more likely to get affected with STDs. Give reasons.

Persons who take drugs intravenously are much more likely to acquire serious infections like

Sulpha drugs work like antibiotics but they are not antibiotics. Give reason.

In a group of people, 37 like coffee, 52 like tea and each person in the group likes at least one of the two drinks. 19 people like both tea and coffee, how many people are in the group?

Give reasons why hybrid seeds are to be produced year after year.

Is it possible to consider vegetative propagation observed in certain plants like Bryophyllum, water hyacinth, ginger, etc., as a type of asexual reproduction? Give two/three reasons.

Assertion : The chromoplasts contain fat soluble carotenoid pigments like carotene and xanthophylls etc. Reason : These pigments give yellow, orange or red colour to some parts of the plant.

If implementation of better techniques and new strategies are required to provide more efficient care and assistance to people, then why is there a statutory ban on amniocentesis? Write the use of this technique and give reason to justify the ban. Amniocentesis for sex-determination is banned in our country. Is this ban necessary? Comment. Or Do you justify the statutory ban on amniocentesis in our country? Give reasons.