The ganglia of sympathetic and the central nervous system in frog develops from the
neural plate cells
neural crest cells
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
Which of the following structure in Pheretima posthuma plays the role of the liver of vertebrates ?
A frog has its brain crushed. But when pinched on the leg, The leg draws away. It is an example of
neurotransmitter incluced response
automated motor response
Simple reflex action is a nerve mediated spontaneous automatic and involuntary response to a stimulus acting on a specific receptor without consulting the will of the animal.
Conditioned reflexes are those reflex actions that are not present at birth but develop later in life through learning, habit, experience or regular association of an indifferent stimulus with unconditioned stimulus.
Non-cellular layer that connects inner surface of the epithelial tissue to the connective tissue is
either (b) or (c).
The peculiar pungent smell of cockroach is produced by the secretions of :
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
The parasphenoid bone in frog forms :
base of cranium
floor of cranium
dorsal side of cranium
dorsolateral side of cranium