Question

Which one of the following statements is incorrect?

• A. In cockroaches and prawns, excretion of waste material occurs through malpighian tubules
• B. In ctenophores, locomotion is mediated by comb plates
• C. In Fasciola, flame cells take part in excretion
• D. Earthworms are hermaphrodites and yet, cross-fertilisation takes place among them

Answer 1

The correct option is A

In cockroaches and prawns, excretion of waste material occurs through malpighian tubules

In many arthropods (including cockroach), excretion takes place through malpighian tubules. However, a class of arthropods called crustaceans (e.g., prawns, crabs) possess structures called antennary or green glands in the antennae at the head region, for excretion.