posted by Ali .
Which of the following are three common characteristics of echinoderms?
A tube feet, circulatory system, body symmetry
B marine-dwellers, endoskeletons, water-vascular system
C bilateral symmetry, ossicles, respiratory system
D mouths, protosomes, body symmetry
is it C?
Which of the following is NOT a characteristic shared by all chordates?
A solid nerve cord
C postanal tail
D pharyngeal pouches
Members of the subphyla Urochordata and Cephalochordata are chordates although they lack
A a backbone.
B pharyngeal pouches.
C a notochord.
D an anus.
is it A?
Three common characteristics of adult vertebrates are
A skull, notochord, and complex organ system.
B backbone, segmentation, and open circulatory system.
C two pairs of jointed appendages, cephalization, and internal skeleton.
D hydrostatic skeleton, bilateral symmetry, and true coelom.
A or C?