Answer:
A shark's skeleton is made of cartilage , a type of strong but flexible tissue .Most other fish are covered in smooth , flat scales . A shark is covered in sharp , toothlike scales called denticles . Most other fish have flaps over their gills.
Explanation:
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Answer:
It makes lipids, phospholipids as in plasma membranes, and steroids.
Explanation:
D all of the above. A monomer is simply a part of the total thing, being a polymer.
The substance is your saliva
