A. Amoeboid cell
B. Stipules
C. Spicules
D. Spines
In sponges fertilization takes place in____________?
A. Ectoderm
B. Mesenchyme
C. Endoderm
D. Uterus
Which of the following are motile zooids in cnidarians?
A. Polyps
B. Medusae
C. Both of these
D. None of these
80% of the food of sponges consists of__________?
A. Detrital organic particles
B. Zooplankton and small animals
C. Phytoplanktons
D. All of these
Which of the following fishes contained lungs?
A. Lamprey
B. Perch
C. Plaice
D. Dipnoi
Mammals became dominant in__________?
A. Proterozoic era
B. Mesozoic era
C. Paleozoic era
D. Cenozoic era
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