Question

Identify the incorrect statements.
(i) Members of gastropoda exhibit torsion.
(ii) Aristotle's lantern is present in heart urchins.
(iii) Anthozoans are polypoid forms.
(iv) Diplopoda includes centipedes.

• A. ii, iii
• B. iii, iv
• C. ii iv
• D. i, ii.

Answer 1

Answer: (C)

ii iv

(i) Members of gastropoda has symmetrical embryo grows into an asymmetrical adult due to twisting (torsion) of the visceral mass during development.

(ii) Aristotle's lantern is a biting and chewing toothed apparatus present in sea urchin but it is unusual in heart urchins.

(iii) Anthozoa are commonly called sea- anemones and corals. They are only in polypoid forms.

(iv) Diplopoda includes millipede while chilopoda includes centipedes.

So, the correct answer is 'ii,iv'.