The parasphenoid bone in frog forms :

• base of cranium

• floor of cranium

• dorsal side of cranium

• dorsolateral side of cranium

2.

The ganglia of sympathetic and the central nervous system in frog develops from the

• neural cell

• neural plate cells

• notochordal cells

• neural crest cells

Tadpoles can be made to grow in size and become adult by

• injecting thyroxine hormone

• feeding the eggs of other frogs

• injecting gonadotrophic hormones

• providing them with suitable climatic conditions

Non-cellular layer that connects inner surface of the epithelial tissue to the connective tissue is

• basement membrane

• epidermis

• dermis

• either (b) or (c).

The peculiar pungent smell of cockroach is produced by the secretions of :

• pheromones

• flame cells

• abdominal glands

• cervical glands

Which of the following structure in Pheretima posthuma plays the role of the liver of vertebrates ?

• Calciferous glands

• Gland cells

• Chloragogen cells

• Cliteller cells

Striped muscles are

• anucleate

• binucleate

• uninucleate

• syncytial

A frog has its brain crushed. But when pinched on the leg, The leg draws away. It is an example of

• neurotransmitter incluced response

• simple reflex

• conditioned reflex

• automated motor response

Excretion in cockroach takes place by

• nephridium

• parotid gland

• coxal glands

• malpighian tubules

Assertion : Leaf butterfly and stick insect show mimicry to dodge their enemies.

Reason : Mimicry is a method to acquire body colour blending with the surroundings.

• If both Assertion and Reason are true and the reason is the correct explanation of the assertion

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

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements