Explanation

Photosynthesis requires carbon dioxide, water, and sunlight, not oxygen.

Respiration, rusting, and combustion all need oxygen to occur.

Explanation

Water (H₂O) is a pure compound, not a mixture.

Tea, air, and alloys are mixtures of different substances.

Explanation

A food web is formed by interconnected food chains in an ecosystem.

It shows multiple feeding relationships and energy flow among organisms.

Explanation

Sepals are part of the flower that protects the developing bud but do not participate in reproduction.

Pollen grain, ovule, and carpel are directly involved in the reproductive process.

Explanation

Abiotic components are non-living parts of the environment.

Water vapor is a non-living element.

While beetle, apple, and lion are living organisms.

Explanation

Sense organs like eyes, ears, nose, skin, and tongue detect different stimuli.

They send signals to the brain, enabling us to perceive the environment.

Explanation

Muscle is a type of tissue that contracts to produce movement.

The three main types of muscle tissues are skeletal, smooth, and cardiac.

Explanation