Madreporite in start-fish is the opening of:
A.Digestive system
B.Water vascular system
C.Both (a) & (b)
D.None of these
A.Digestive system
B.Water vascular system
C.Both (a) & (b)
D.None of these
A.Having well developed protractor lentis muscles
B.Capability of changing the size of eye ball
C.Capability to change the convexity of lens which changes its focal length
D.None of these
A.Cornea
B.Sclera
C.Choroid
D.None of these
A.Digestive system of star-fish
B.Respiratory system of star-fish
C.Water vascular system of star-fish
D.None of these
A.Tomatoes
B.Carrots
C.Radish
D.Guava
A.Radially symmetrical
B.Bilaterally symmetrical
C.Biradially symmetrical
D.None of these
A.Iodopsin
B.Rhodopsin
C.Both (a) & (b)
D.None of these
A.Echinodermata
B.Nematoda
C.Protozoa
D.Arthropoda
A.Retinal cells
B.Cornea
C.Sclerotic
D.Choroid