Marine crustaceans that are sessile, secrete calcareous plates and filter-feed are:. a. ostracods.
b. barnacles.
c. copepods.
d. decapods.
e. isopods.

B. Barnacles

Explanation:

Marine crustaceans that are sessile, secrete calcareous plates and filter-feed are Barnacles. Barnacles are the only sessile crustaceans known in the world.

They are characteristic to marine environments and they are usually found in shallow environments. They are edible due to their relationship with crustaceans such as shrimps etc

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;