Tunic is

A

Sac- like covering of urochordates

B

A string inside cephalochordates

C

Collar of hemichordates

D

None of the above

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Term "Tunic":** - The term "tunic" refers to a specific type of body covering found in certain organisms. 2. **Identifying the Organisms:** - The organisms in question are urochordates, cephalochordates, and hemichordates. Each of these groups has distinct characteristics. 3. **Analyzing Urochordates:** - Urochordates, also known as tunicates, are characterized by having a sac-like covering known as the tunic. This tunic is made up of complex proteins and carbohydrates, including a substance called tunicin, which is a type of cellulose. 4. **Examining Cephalochordates:** - Cephalochordates do not possess a tunic. Instead, they have a more streamlined body structure without a sac-like covering. 5. **Looking at Hemichordates:** - Hemichordates have a structure known as a collar, but this is not referred to as a tunic. Therefore, this option is also incorrect. 6. **Evaluating the Options:** - The options provided were: a) Sac-like covering of urochordates b) String inside cephalochordates c) Collar of hemichordates d) None of the above - Based on the analysis, the only correct option is the first one: the sac-like covering of urochordates. 7. **Conclusion:** - Therefore, the correct answer to the question "Tunic is" is: **a) Sac-like covering of urochordates.** ---
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