Explanation

• The genetic material (DNA) of an organism can undergo changes called mutations due to environmental factors.
• Examples of environmental factors: radiation, chemicals, UV light.
• Such changes can lead to variation in traits and sometimes evolution.

Last verified on 11-02-2026

Explanation

• Sheet erosion is the uniform removal of a thin layer of topsoil from a large area.
• Common on sloping lands due to rainfall or irrigation runoff.
• Leads to loss of fertile soil and reduced crop productivity.

Last verified on 12-02-2026

Explanation

• GDP (Gross Domestic Product) measures the total value of all goods and services produced within a country in a year.
• Does not include income from abroad.
• Used to assess economic performance and growth.
• Expressed in monetary terms (currency).
• Helps in policy-making and comparing economies.

Last verified on 12-02-2026

Explanation

• Bacteria reproduce asexually mainly by binary fission, where one cell splits into two identical cells.
• This is a rapid process, allowing bacteria to multiply quickly under favorable conditions.

Last verified on 12-02-2026

Explanation

• Parturition is the process by which animals give birth to young ones.
• Marks the end of pregnancy in mammals.
• Triggered by hormonal changes in the mother.
• Ensures continuation of species.
• Observed in cows, sheep, goats, humans, and other mammals.

Last verified on 12-02-2026

Explanation

• The term Bovine refers to cattle, including cows and bulls.
• Belongs to the family Bovidae in the animal kingdom.
• Includes domesticated species used for milk, meat, and labor.

Last verified on 12-02-2026

Explanation

• The body of a sheep is covered with fleece, which is a mass of soft, dense, and curly fibers.
• Fleece provides insulation and protection to sheep.
• It is sheared and processed to produce wool for textiles.
• Quality of fleece varies by breed and age.
• Important for clothing industry and economic value.

Last verified on 12-02-2026

Explanation

• These vegetables are biennial plants, completing their life cycle in two years.
• First year — vegetative growth (leaves and roots).
• Second year — flowering and seed production.
• Commonly grown for edible roots and leaves.
• Examples: Carrot, Radish, Cabbage, Beet.

Last verified on 12-02-2026

Explanation

Explanation

• Clayey soil has very fine particles and a large surface area.
• It can hold more water.

Additional information:

• Silty — moderate water retention
• Loamy — balanced water retention and drainage
• Sandy — low water retention, drains quickly
• Stony — very low water retention

Last verified on 12-02-2026