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
B.
simple reflex
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.
All veins carry deoxygenated blood except
pulmonary vein
hepatic vein
hepatic portal vein
renal vein
Photorespiration usually occurs in
one cell organelle
two cell organelles
three cell organelles
four cell organelles
Velamen is a specialized tissue found in
aerial roots of orchids
succulent leaves
pneumatophores
stilt roots
Hydroponics is
cultivation of plants in water
growth of plants towards water
growth of plants away from water
soil less cultivation of plants
Induction of flowering by low temperature in plants is
cryobiology
vernalization
phototropism
pruning
The protists have
only free nucleic acid aggregates
membrane bound nucleoproteins lying embedded in the cytoplasm
nucleoprotein in direct contact with the rest of the cell substance
none of these
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