Explanation

Tulips, lilies, daffodils, and onions reproduce through bulbs, which are underground storage organs.

Bulbs store food and help the plant survive unfavorable conditions.

Explanation

Strawberries reproduce asexually through runners, which are horizontal stems that grow along the ground and produce new plants.

Cactus plants usually reproduce through cuttings.

Explanation

The Widal test is used to diagnose Typhoid fever.

It detects antibodies against Salmonella typhi and Salmonella paratyphi, the bacteria responsible for typhoid.

It is a serological test that checks for agglutination (clumping) of bacteria in response to specific antigens.

Explanation

Plasmodium is a protozoan parasite that causes malaria in humans.

It belongs to the phylum Apicomplexa, which includes other parasitic protozoa.

Explanation

Explanation

Muscular endurance is the ability of muscles to perform repeated actions over a long period without fatigue.

It is essential for activities like running, swimming, and cycling.

Explanation

The time period (T) of a simple pendulum is given by:

T ∝ √L

If the length (L) is made four times:

New time period T' ∝ √(4L)

T' ∝ 2√L

T' = 2T

The time period will become double.

Explanation

A glucoside bond (glycosidic bond) is a type of covalent bond that links sugar molecules in disaccharides and polysaccharides.

Lactose, a disaccharide, consists of glucose and galactose joined by a β-1,4-glycosidic bond.

Explanation

NH₄Cl (Ammonium chloride) contains three types of chemical bonds:

• Covalent bond → Between N (Nitrogen) and H (Hydrogen) in the NH₄⁺ (Ammonium ion).
• Coordinate (Dative) bond → Between N and one of the H atoms, where nitrogen donates a lone pair.
• Ionic bond → Between NH₄⁺ (Ammonium ion) and Cl⁻ (Chloride ion).

Explanation

Each human lung contains approximately 300 million alveoli, providing a large surface area for gas exchange.

These tiny air sacs help in the efficient exchange of oxygen and carbon dioxide in the lungs.