Characteristics of cartilaginous fish __________ .
A.
Body is covered with specious scales.B.
Their gills open directly to the outside.C.
Their upward movement is accomplished by air sacs.D.
They live in seas and rivers.Answer & Solution
Answer:
Their gills open directly to the outside.
Solution:
Cartilaginous fish, such as sharks and rays, have gill slits
that open directly to the outside, unlike bony fish.
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