21.
Earthworm helps farmers by
A
Destroying harmful bacteria
B
Destroying harmful and insects
C
Making soil porous and loose
D
Both (a) and (b)
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Earthworm helps farmers by
Destroying harmful bacteria
Destroying harmful and insects
Making soil porous and loose
Both (a) and (b)
Earthworm have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton .It is due to
satae
gut peristalsis
setae
coelomic fluid
Earthworm has
Two eyes
Many eyes
No eyes
One eyes
Copulation in Earthworm occurs during
Night in water
Night in rainy season
Night in summer season
Day in rainy season
Chromophil cells in earthworm are concerned with the secretion of
Amylase
Protease
Lipases
Coccon
Body of earthworm is divided into how many similar segments which are called metameres or somites?
60 - 120
100 - 120
120 - 140
120 or more
Annelids are
Radially symmetrical
Externally segmented
Triploblastic
Pseudocoelomate