In Ascidia, testis is soft, thick and transparent. It is composed of

Porphine

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Tunicirine

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Bilirubin

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Mucin

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Solution

The correct option is B Tunicirine
Ascidiacea is a class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. Ascidians are characterized by a tough outer "tunic" made of the polysaccharide cellulose. Their testis is soft, thick and transparent and it is composed of tunicirine.
Therefore, the correct answer is option B.

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