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Question
External coat composed of cellulose like material occurs in
External coat composed of cellulose like material occurs in
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Solution
The correct option is B Urochordata
External coat composed of cellulose like material occurs in Urochordata. The body is surrounded by a test or tunic, from which the subphylum Tunicata derives its name. This varies in thickness between species but may be tough, resembling cartilage, thin and delicate or transparent and gelatinous. The tunic is composed of proteins and complex carbohydrates and includes tunicin, a variety of cellulose. The tunic is unique among invertebrate exoskeletons in that it can grow as the animal enlarges and does not need to be periodically shed. Inside the tunic is the body wall or mantle composed of connective tissue, muscle fibres, blood vessels and nerves.Thus, the correct answer is option B.
External coat composed of cellulose like material occurs in Urochordata. The body is surrounded by a test or tunic, from which the subphylum Tunicata derives its name. This varies in thickness between species but may be tough, resembling cartilage, thin and delicate or transparent and gelatinous. The tunic is composed of proteins and complex carbohydrates and includes tunicin, a variety of cellulose. The tunic is unique among invertebrate exoskeletons in that it can grow as the animal enlarges and does not need to be periodically shed. Inside the tunic is the body wall or mantle composed of connective tissue, muscle fibres, blood vessels and nerves.
Thus, the correct answer is option B.
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