'Water vascular' system is found in

• sea-anemone

• sea-pen

• sea-cucumber

• sea-horse

Retrogressive metamorphosis occurs in

• Hemichordata

• Cephalochordata

• Urochordata

• Vertebrata

'Organ of Jacobson' helps in

• touch

• vision

• smell

• hear

Cysticercus stage is formed in

• Taenia

• Plasmodium

• Leishmania

• Wuchereria

Which of the following is a catadromous fish?

• Hilsa sp.

• Mystus sp.

• Anguilla sp.

• Channa sp.

Which of the following animal belongs to class-Crustacea?

• Cockroach

• Cyclops

• Grasshopper

• Mosquito

Radula is found in

• Pila sp.

• Chiton sp.

• Lamellidens sp.

• Pinctada sp.

the scientific name of Asian Tiger Mosquito

• Aedes aegypti

• Aedes albopictus

• Aedes taeniorhynchus

• Aedes albolineatus

Ornithorhynchus is an example of

• dinosaur

• monotreme mammal

• marsupial mammal

• eutherian mammal

Which of the following is not correctly matched?

• Sycon - Canal system

• Star fish - Radial symmetry

• Ascaris - Flame cell

• Prawn - Haemocoel