Animal Kingdom

Assertion : Salamander, Sphenodon are classified as amphibians.

Reason : Sphenodon is regarded as living fossil.

• If both Assertion and Reason are true and Reason is the correct explantion of Assertion

• If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

• If Assertion is true but Reason is false

• If Assertion is false but Reason is true

Hydra receives impulses and stimuli through

• nerve net

• nematocytes

• sensory cells

• flame cells

The red colour of 'red sea' is due to which of the following blue-green algae?

• Chlamydomonas nivalis

• Anabaena

• Microcystis

• Trichodesmium

Identify the correct statement

• In amniotes last nerve is spinal accessory

• In non- amniotes last nerve is vagus.

• Optic is shortest nerve

• Olfactory nerves has mixed fibres.

Class Crustacea has following features :

• Cephalothorax, book lungs, chitinous exoskeleton

• Head and thorax, biramous appendages, book lungs

• Head and thorax, book lungs, chitinous exoskeleton

• Cephalothorax, biramous appendages, gills

Which of the following Phyla are included in Enterozoa?

• Annelida, Mollusca, Porifera

• Echinodermata, Hemichordata, Porifera

• Mollusca, Arthropoda, Hemichordata

• Porifera, Mollusca, Arthropoda

A definite number of segments are found in

• slug

• earthworm

• leech

• tapeworm

The sites of the first, second and third moulting of the Ascaris larva are respectively

• soil, lung and intestine

• liver, stomach and intestine

• soil, alveoli and alveoli

• soil, intestine and lung

Which of the following is correct about nematocyst?

• It can be re-used.

• It is excretory organ in arthropods.

• It is ejected on contact and pierce the prey.

• None of these.

Ambulacral grooves are absent in the living forms of the Class

• Crinoidea

• Asteroidea

• Ophiuroidea

• Echinodermata