✓✗Select the correct statements with reference to chordates.
A. Presence of a mid-dorsal, solid and double nerve cord.
B. Presence of closed circulatory system.
C. Presence of paired pharyngeal gill slits.
D. Presence of dorsal heart.
E. Triploblastic pseudocoelomate animals.
Choose the correct answer from the options given below:

✓✗Deuterostome condition and indeterminate radial cleavage are characteristics of

✓✗Select the group of organisms all of whose members are diploblastic.

✓✗Which one of the following animals possesses nerve cells but no nerves?

✓✗Prochordates lack

✓✗The excretory structures of flatworms/ Taenia are

✓✗Torpedo is commonly called

✓✗Which of the following statements about molluscs are correct?
A. The body is covered by a calcareous shell.
B. The body is metamerically segmented.
C. The mantle covers the visceral hump.
D. They are usually dioecious and oviparous.
E. Development is always direct.

✓✗Which one of the following is a matching pair of a body feature and the animal possessing it?

(1)	Ventral central nervous system	Leech
(2)	Pharyngeal gill slits absent in embryo	Chamaeleon
(3)	Ventral heart	Scorpion
(4)	Post-anal tail	Octopus

✓✗Echinoderms and chordates have

✓✗Members of which phylum are mostly endoparasites found in animals, including human beings?

✓✗Which is not correct for sponges?

✓✗Which of the following statements is/are correct with regard to deuterostomes?
(a) The blastopore develops into the anus.
(b) The blastopore develops into the mouth.
(c) Cleavage is radial and indeterminate.
(d) Cleavage is spiral and determinate.

✓✗Bony fishes are

✓✗Axolotl is the larva of