Explanation

• A J-shaped growth curve represents exponential population growth.
• It occurs when resources are unlimited.
• Organisms reproduce at their biotic potential.
• Growth continues rapidly without environmental resistance.

Last verified on 04-06-2026

Explanation

• Bombyx mori, which is the scientific name for the Mulberry silkworm.
• This species is widely cultivated for its silk production.
• It is often referred to as the "Domesticated silkworm" or simply "Silkworm".

Last verified on 04-06-2026

Explanation

• Blood in humans is slightly alkaline in nature.
• Its normal pH ranges from 7.35 to 7.45.
• This balance is important for proper body functions.
• Even small changes in pH can affect health.

Last verified on 04-06-2026

Explanation

• Microtubules are cytoskeletal filaments responsible for movement inside cells.
• They help in transporting organelles within the cell.
• They also play a key role in cell division.
• They act as “tracks” for intracellular movement.

Last verified on 04-06-2026

Explanation

• Glass snake is actually not a true snake.
• It is a legless lizard that resembles a snake.
• Coral snake → True snake
• Sea snake → True snake
• Rattlesnake → True snake

Last verified on 04-06-2026

Explanation

• H. J. Muller was the first scientist to induce mutations using X-rays in fruit flies (Drosophila).
• His groundbreaking experiments were conducted in 1927.
• He demonstrated that X-rays can cause genetic changes (mutations).
• This discovery greatly advanced the field of genetics.

Last verified on 04-06-2026

Explanation

• Cell specialization (differentiation) occurs when cells perform specific functions.
• Specialized cells have the same DNA but use different genes.
• Different genes are turned on or off according to the cell's role.
• This process allows the formation of tissues and organs.

Last verified on 04-06-2026

Explanation

• A Barr body is a densely staining structure found in the nuclei of female somatic cells.
• It represents an inactive X chromosome.
• It is visible during the interphase stage of the cell cycle.
• It helps in dosage compensation between males and females.

Last verified on 04-06-2026

Explanation

• Crossing over occurs in Pachytene stage of Prophase I.
• Homologous chromosomes are fully paired and exchange genetic material at this stage.
• This leads to new gene combinations.

Last verified on 20-05-2026

Explanation