Explanation

Fehling's test is used to identify aldehydes by producing a red precipitate.

Aldehydes reduce Fehling’s solution, unlike ketones.

Explanation

Agree and Disagree are antonyms — words with opposite meanings.

Pull and Push are also antonyms, matching the same relationship.

Explanation

Cockroaches eat both plant and animal matter, making them omnivores.

They are scavengers that feed on a wide variety of organic material.

Explanation

The capsule is a protective, gelatinous layer outside the bacterial cell wall.

It helps bacteria avoid phagocytosis and enhances their ability to cause disease.

Explanation

Oxygen is the most abundant bio-element in living organisms.

It mainly due to its presence in water and organic molecules.

It makes up about 65% of the human body by mass.

Explanation

The scrotum is a sac-like structure that houses the testes (male gonads) outside the body to regulate temperature for sperm production.

It ensures optimal conditions (cooler than body temperature) for spermatogenesis.

Explanation

3-Hexanone is a ketone, and on oxidative cleavage with KMnO₄/H₂SO₄, it splits at the carbonyl group.

The cleavage yields acetic acid (CH₃COOH) and butanoic acid (CH₃CH₂CH₂COOH).

Explanation

Explanation

1. Sodium (Na)
2. Hydrogen (H)
3. Carbon (C)
4. Oxygen (O)

Explanation

Tertiary consumers are at the top of the food chain and feed on secondary consumers.

Lion, tiger, and hawk are carnivores that eat other carnivores or herbivores.