a) development of a circulatory system with blood.
b) sexual reproduction.
c) feeding on nutrients suspended in the water (filter feeding).
d) concentration of sense organs in the head region.
e) radial symmetry.
Creeping behavior %26amp; a mouth located toward the head end of the body may have led in some evolutionary lines to
Definetly D. Most sense organs are used to locate food of some sort. So it would make sense to have them near the mouth.
Reply:sounds like a recipe. but true
Reply:b
Reply:D
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