OESOPHAGUS STOMACH
ECHINODERMS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
True
|
|
|
False
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -Echinoderms lack a specialized body cavity that is located between the intestinal canal and body wall called coelom. Hence, they are acoelomates. So, statement (v) is correct.
Detailed explanation-2: -Echinoderms are coelomates that have a deuterostome pattern of embryo development. The same pattern of development occurs in the chordates.
Detailed explanation-3: -Echinoderms are named for their spiny skin, which is covered by a thin layer of calcium carbonate plates and spines. Adult echinoderms have radial symmetry, but larvae have bilateral symmetry. Echinoderms have a unique water vascular system, with canals that extend along each body part.
Detailed explanation-4: -Answer and Explanation: The correct answer is (b). Echinoderms do not have gills.
Detailed explanation-5: -Answer and Explanation: Members of the phylum Echinodermata are coelomates.