Q. Choanocytes in sponges are present
A. on the external body surface
B. line the gastric cavity
C. in the mesodermal layer
D. located between the outer and inner layers
Answer: line the gastric cavity
A. on the external body surface
B. line the gastric cavity
C. in the mesodermal layer
D. located between the outer and inner layers
Answer: line the gastric cavity
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