Class Crustacea differ from Insecta in having: from Biology Anim

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Animal Kingdom

Multiple Choice Questions

251.

The excretory material of bony fish is:

urea
protein
ammonia
amino acid

252.

Food storage in Leucosolenia occur by :

ostia
osculum
thesocyte
spongocoel

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253.
Class Crustacea differ from Insecta in having:

two pairs of antennae

jointed foot

chitinous cuticle

none of these

A.

two pairs of antennae

Main characteristics of Class- Crustacea and Insects are as follows:-

Class Crustaces: They are mostly aquatic with gills, two pairs of antennal and three pairs of jaws, appendages. These are mostly biramous and always more than four in the trunk region. Eg, Prawn, Crab etc.
Class- Insecta : These are hexapod arthropods with a pair of antennae and three pairs of jaws. Eg, Cockroach, Grasshopper etc.

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254.

Which of the following character is presence essentialy in chordates ?

Ventral spinal chord
Dorsal heart
Pharyngeal gill slits
Blood flow in forward direction in ventral blood vessels

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255.

Which insect is useful for us ?

Periplaneta
Musca
Bombyx
Mosquitoes

256.

Which of the following is not found in Hydra ?

Epithelio-muscular cells
Cnidocyte
Choanocyte
Nerve cells

257.

Which of the following symmetry is found in adult sea-anemone ?

Radial
Biradial
Bilateral
Spherical

258.

Body cavity of adult Ascaris is :

haemocoel
amphicoel
pseudocoel
schizocoel

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259.

All worms are :

triploblastic
segmented
endo-parasites
free - living

260.

Pearl oyster is a mollusc which belongs to class :

Cephalopoda
Pelecypoda
Scaphopoda
Gastropoda

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