Question

Which statements are not correct?
a. Parapodia are lateral appendages in arthropods used for swimming.
b. Radula in molluscs is structure involved in excretion
c. Aschelminthes are dioecious
d. Echinoderm adults show radial symmetry
e. Ctenophores are diploblastic.

• A. a and b
• B. a and c
• C. a, d, and e
• D. c and e
• E. b, c and d

Answer 1

The correct option is A a and b

In animals of phylum Annelida, aquatic annelids like Nereis possess lateral appendages, parapodia, which help in swimming. In animals of phylum Mollusca, the mouth contains a file-like rasping organ for feeding, called radula. In animals of phylum Aschelminthes, sexes are separate (dioecious) i.e., males and females are distinct. The adult echinoderms are radially symmetrical but larvae are bilaterally symmetrical. Ctenophores are diploblastic organisms with tissue level of organisation.

So answer is A (a and b)