Respiration and Circulation — BIOLOGY STD 12 Science — Question

List some adverse effects of particulate matter on human health.

1. Why are catalytic converters recommended for vehicles?
2. Why should such vehicles use only unleaded petrol?
3. Why is CNG preferred to diesel as a fuel in vehicles?

Distinguish between : In-situ and ex-situ conservation.

What is somatic hybridisation? Explain the various steps involved in the process. Mention any two uses of somatic hybridisation.

Describe female reproductive system of human

Lake can literally get choked to death due to eutrophication.

Your school has been selected by the Department of Education to organise and host an interschool seminar on "Reproductive Health - Problems and Practices". However, many parents are reluctant to permit their wards to attend it. Their argument is that the topic is "too embarrassing."
Put forth four arguments with appropriate reasons and explanation to justify the topic to be very essential and timely.

It is commonly observed that parents feel embarrassed to discuss freely with their adolescent children about sexuality and reproduction. The result of this parental inhibition is that the children go astray sometimes.

1. Explain the reasons that you feel are behind such embarrassment amongst some parents to freely discuss such issues with their growing children.
2. By taking one example of a local plant and animal, how would you help these parents to overcome such inhibitions about reproduction and sexuality?

Applications of tissue culture.

Does apiculture offer multiple advantages to farmers? List its advantages if it is located near a place of commercial flower cultivation.