Animal Kingdom Question 1
Question: 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 gillslits.
D. Presence of dorsal heart
E. Triploblastic pseudocoelomate animals.
Choose the correct answer from the ptions given below:
(1) C, D and E only
(2) A, C and D only
(3) B and C only
(4) B, D and E only
Show Answer
Answer: (3) B and C only
Explanation:
- Chordates are characterized by the presence of a notochord, a dorsal hollow nerve cord, pharyngeal gill slits, and a post-anal tail at some stage of their development.
- Statement A is incorrect because chordates have a dorsal, hollow, and single nerve cord, not a solid and double one.
- Statement B is correct because chordates typically have a closed circulatory system.
- Statement C is correct because chordates have paired pharyngeal gill slits at some stage of their development.
- Statement D is incorrect because chordates have a ventral heart, not a dorsal heart.
- Statement E is incorrect because chordates are triploblastic coelomate animals, not pseudocoelomate.
BETA
