Question

Which among the following is a common feature of vertebrates?

• A. Limbs for locomotion
• B. Persistent notochord
• C. Closed circulatary system
• D. Direct development

Answer 1

The correct option is C Closed circulatary system

Subphylum vertebrata shows following characteristics:

1. A well-developed brain and brain lodged in a brain-box or cranium.
2. The notochord forms on the dorsal side of the primitive gut in the early embryo.
3. The notochord is present at some developmental stage in all chordates.
4. Possess at some stage of their life gill slits in the pharyngeal region.
5. The endoskeleton of most vertebrates is made of cartilage or bone.
6. All vertebrates have a heart and a closed circulatory system.
7. Most vertebrates possess guts with a non-terminal anus, i.e., post-anal tail is present.
8. They possess a dorsal hollow nerve tube at some stage of their life