Evolution Of Life
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19 Which of the following does not have blood but undergoes respiration?
A
Cockroach
B
Snail
C
Hydra
D
Kangaroo
20 Which group of animals are exclusively free living marine animals?
A
Arthropoda
B
Echinodermata
C
Mollusca
D
Nematoda
28 For How many years have the dinosaurs been extinct?
A
About 25 million years
B
About 65 million years
C
About 100 million years
D
About 135 million years