Question

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Answer 1

Answer:

it should be 3) 3 pair of jointed legs in thorax

Answer 2

Answer:

THE 3 ANIMALS ARE

• GRASSHOPPER
• SCORPIAN
• PRAWN

The differ in all three are:-

open circulation-->

an open circulatory system is made of heart,vessels,hemolymph.

• Grasshopper has open circulatory syste.....here hemolymph moves through interconnected sinuses.
• Scorpian are arthropods and they too have hemolymph .They also have same .
• prawns are too having open circulation as being arthropods.

Cephalothorax +abdomen - here there is comprising of head and thorax fused together behind the abdomen.

{ ALL 3 CONTAINS IT}

ALL HAVE 3 PAIRS OF JOINT LEGS ON THORAX .

BOOK LUNGS :-

SCORPIANS AND PROWNS CONSIST OF BOOK LUNGS.

BUT IN GRASS HOPPER

• the first and third segment of thorax have spiracles on each sides.By these spiriacles oxygen enters in body.

Answer is 4

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