HSC Science Class 12 - Tamil Nadu Board of Secondary Education Question Bank Solutions

What are the reasons for Mendel’s successes in his breeding experiment?

Explain the law of dominance in a monohybrid cross.

List the ways by which seeds can be stored for longer duration.

Discuss the importance of neem in seed storage?

Select the mismatch.

The active principle trans-tetra hydro canabial is present in

Name the humors that are responsible for the health of human beings.

Give an account of the active principle and medicinal values of any two plants you have studied.

People’s movement for the protection of the environment in Sirsi of Karnataka is

How do sacred groves help in the conservation of biodiversity?

Observe the following statements and pick out the right option from the following:

Statement I: The drug sources of Siddha include plants, animal parts, ores, and minerals.

Statement II: Minerals are used for preparing drugs with a long shelf-life.

Which of the following statement(s) is/are correct?

1. Mushrooms are the fruiting body of edible fungi.
2. Single-cell proteins are the dried cells of micro-organisms.
3. Regular use of liquid seaweed fertilizer will help plants to withstand environmental stress.
4. SCP can completely replace conventional protein sources.

Select the incorrect pair/pairs of statements about single-cell protein

1. Chemical pesticides - Safe for human and the environment
2. Mushrooms - White vegetable
3. Zarrouk medium- Culture medium
4. Seaweed - Rich in potassium

Match the following pairs about mushroom cultivation.

Assertion: In Spirulina culture, half of the required nutrients added first and the rest in later.

Reason: If all the nutrients are added first, it will affect the culture's growth.

Give definitions for organic farming?

Define bonsai?

What is a terrarium?

Write the origin and area of cultivation of green gram and red gram.

Enumerate the uses of turmeric.