Define the following terms and give one example of each:
$(a)$ Bilateral symmetry
$(b)$ Coelom
$(c)$ Triploblastic

(N/A) Bilateral symmetry: It is a body plan in which the left and right halves of the body are mirror images of each other,e.g.,Liver fluke.
$(b)$ Coelom: It is the internal body cavity between the visceral organs and the body wall in which well-developed organs can be accommodated,e.g.,Butterfly.
$(c)$ Triploblastic: Animals having three germinal layers (ectoderm,mesoderm,and endoderm) from which differentiated tissues and organs can be formed are called triploblastic,e.g.,Starfish.