Kingdom Animalia Metazoa - Questions & Answers | Exam2Win

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26. Digestion of food is completed in sponges in

A. Choanocytes

B. Trophocytes

C. Thesocytes

D. Phagocytes

Explanation:

27. Many sponges may be bigger than fishes, yet they do not have respiratory organs because they

A. Are sedentary

B. Have porous body

C. Respire anaerobically

D. Do not require them

Explanation:

28. Pinacocytes are

A. Ectodermal

B. Mesodermal

C. Endodermal

D. Interstitial cells

Explanation:

29. Myocytes of sponges show

A. Contractibility

B. Nervous excitation

C. Secretion of fibres

D. All the above

Explanation:

30. Sponges are characterized by

A. Absence of organs and tissues

B. Presence of tissues but absence of organs

C. Presence of both tissues and organs but absence of organ systems

D. Absence of cells

Explanation: