Question

Chemicals synthesized by one organism that affect behaviour of another member of the same species are called

• A. Enzymes
• B. Hormones
• C. Flavoids
• D. Pheromones

Answer 1

Answer: (D)

Pheromones

A. Enzymes are the biocatalysts that speed up the rate of reaction without getting altered.

B. Hormones are chemicals or signalling molecules secreted from endocrine glands in the blood from where they are carried to target organs and cause changes in their functioning and regulation.

C. Flavonoids are a type of metabolites that provide various health benefits.

D. Pheromones are chemicals that are used for communication amongst organisms of different species. They are secreted from exocrine glands and act like hormones outside the body of organism. They are also secreted to attract mates.

Hence, the chemicals synthesised by one organism that affect behaviour of another member of same species are called pheromones.

So, the correct answer is 'Pheromones'.