Explanation

• Interview schedule is used when respondents are illiterate.
• Extension worker asks questions orally and records answers himself.
• No reading or writing is required from farmers.

Last verified on 03-02-2026

Explanation

• Water supplied to crops other than rainfall and rauni is called irrigation water.
• It is provided artificially through canals, tube wells, or sprinklers.
• Essential for crop growth where rainfall is insufficient.

Last verified on 03-02-2026

Explanation

• Microbiologists study microorganisms using specific media that provide nutrients for growth.
• Agar is widely used because it is solid at room temperature and supports the growth of many bacteria.

Additional information:

• Agar is derived from red algae.
• It was first used in 1882 by Fannie Hesse for culturing bacteria.

Last verified on 01-02-2026

Explanation

• Dioecious plants have male and female reproductive organs on separate flowers.
• Each plant is either male (produces pollen) or female (produces ovules).
• Ensures cross-pollination and genetic diversity.

Last verified on 03-02-2026

Explanation

• Cryogenic storage involves storing biological materials or food at ultra-low temperatures (usually below −150°C).
• Prevents microbial growth and slows down biochemical reactions.
• Used for seeds, tissues, and germplasm preservation.

Last verified on 03-02-2026