Explanation

• Oligopsony is a market with few buyers and many sellers.
• Buyers have strong control over prices.
• Sellers compete to sell to limited buyers.

Additional information:

• Monopoly = one seller, many buyers
• Monopsony = one buyer, many sellers
• Oligopoly = few sellers, many buyers

Last verified on 04-02-2026

Explanation

• DBH = Diameter at Breast Height.
• It is the standard method to measure tree diameter.
• According to FAO and forestry standards, it is measured at 1.3 m (4.5 ft) from ground level.
• This gives uniform and comparable tree data.
• Widely used in forest inventory and research.

Last verified on 04-02-2026

Explanation

• Aggregate fruit develops from one flower having many pistils.
• Each pistil forms a small fruitlet.
• All fruitlets are attached to the same receptacle.
• Together they make one aggregate fruit.
• It is different from multiple fruit (many flowers).
• Example: Strawberry, Raspberry, Blackberry, Custard apple, Magnolia

Last verified on 04-02-2026

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

Explanation

• Holometabolous insects undergo complete metamorphosis.
• Their life cycle: Egg → Larva → Pupa → Adult.
• The young stage after egg is called larva.

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