Question

Asterias are

• A. Uricotelic
• B. Ammonotelic
• C. Ureotelic
• D. None of the above

Answer 1

The correct option is B Ammonotelic

There are different types of excretion depending on the type of the excreted product. The organisms which excrete the ammonia as the waste product are called as ammonotelic organisms. Some of the invertebrates like molluscs and some echinoderms excrete excess of amino acids as the excretory product. This form of excretion is called aminotelic excretion or aminotelism. Asterias are echinoderms and are aminotelic.

Thus, the correct answer is option B.