Question

Parasites absorb nourishment from host by

• A. Haustoria
• B. Clinging roots
• C. Fibrous roots
• D. Velamen roots

Answer 1

The correct option is A Haustoria

• Haustoria are root modifications that can penetrate the vascular structure of other plants. So, the parasitic plant absorbs nourishment by haustoria.
• The clinging roots found in the epiphytes help to fix the plant on the bark of another tree.
• Fibrous root systems are characteristic of monocots in which primary roots are short-lived and, therefore, as the plant develops, these roots are replaced by many fibre-like roots arising from the base of the stem.
• Velamen is found in aerial roots of orchids (epiphytes) covered by hygroscopic tissue. They absorb water from the atmosphere.

So, the correct option is 'Haustoria'.