Question

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h) In cephalopods a pair of
the gills.
iv)
glands depending on their position.
The two pairs of insect wings are articulated with pro and mesothorax.
v)
The secretion of prothoracic glands regulates metamorphosis in insects.
vi) Class Xiphosura is regarded as living fossil.
vii) Development in bivalves includes trochophore and veliger larvae.
viii) The blood of cephalopods contains haemocyanin.
ix) In brittle stars tube feet aid in locomotion.
Aristotle's lantern is a complex chewing organ of sea urchin.
x)
Describe canal system in Porifera.​

Answer 1

Answer:

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