HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

PBR 322, BR stands for

Write the benefits and risk of Genetically Modified Foods.

Which of the following would most likely help to slow down the greenhouse effect.

Find the wrongly matched pair.

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancer?

One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as 

One of the chief reasons among the following for the depletion in the number of species making endangered is

The unit for measuring ozone thickness

What is ozone hole?

Which one gas is most abundant out of the four commonest greenhouse gases?
Discuss the effect of this gas on the growth of plants?

The plants which are grown in silivpasture system are

Which one of the following are the species that are crossed to give sugarcane varieties with high sugar, high yield, thick stems, and the ability to grow in the sugarcane belt of North India?

Consider the following statements and choose the right option.

1. Cereals are members of the grass family.
2. Most of the food grains come from monocotyledon.

Assertion: Vegetables are important part of healthy eating.

Reason: Vegetables are succulent structures of plants with pleasant aroma and flavours.

Groundnut is native of ______

Statement A: Coffee contains caffeine
Statement B: Drinking coffee enhances cancer

Tectona grandis is coming under family

Tamarindus indica is indigenous to

New world species of cotton

Assertion: Turmeric fights various kinds of cancer

Reason: Curcumin is an anti-oxidant present in turmeric