Question

A root parasite is

• A. Loranthus
• B. Rafflesia
• C. Viscum
• D. Cuscuta

Answer 1

The correct option is B Rafflesia

A. Loranthus is a partial stem parasite as it depends on the host for only water and minerals.

B. Rafflesia grows on the roots of the host plant and obtains water and sugars, thus it is considered a total root parasite.

C. Viscum depends on host plant only for water and minerals and stays on the host stem, thus it is a partial stem parasite.

D. Cuscuta is a complete stem parasite as it depends for both water and sugars from the host plant.

So, the correct option is 'Rafflesia'.