Assertion : All motor neurons are efferent neurons.
Reason : Motor neurons conduct nerve impulses from the spinal cord to the brain.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false.
If both assertion and reason are false
D.
If both assertion and reason are false
Afferent neurons are sensory that carry nerve impulses from sensory stimuli towards the central nervous system and brain, while efferent neurons are motor neurons that carry neural impulses away from the central nervous system and towards muscles to cause movement.
Assertion : Atmospheric nitrogen gas is always fixed by nitrogen-fixing micro-organisms.
Reason : Decomposers release nitrogen gas from dead bodies of plants and animals.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : CAM plants lack structural compartmentation of leaf as found in C4 plants.
Reason : Stomata of CAM plants are open during the day.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Carbohydrates are more suitable for the production of energy in the body than proteins and fats.
Reason : Carbohydrates can be stored in the tissues as glycogen and can be used for the production of energy, whenever necessary.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : In Pleurobrachia, eight comb like ciliary plates called comb plates are present on the body that help in locomotion.
Reason : Pleurobrachia reproduces sexually and its life cycle includes cydippid larva.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
Assertion : In opposite phyllotaxy two leaves are borne on the opposite sides of a single node.
Reason : Opposite phyllotaxy is seen in China rose and Oleander.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Pili are tubular structures present in bacteria which help in conjugation.
Reason : Formation of pili is controlled by F+ or fertility factor.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Presence of pneumatophores is a special adaptation of hydrophytes.
Reason : Pneumatophores are positively geotropic shoots that have lenticels and help in gaseous exchange.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Sphagnum is slowly carbonised, compressed and fossilised over thousands of years to produce a dark spongy mass called peat.
Reason : Peat helps to keep soil porous and it also improves water holding capacity of the soil.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Storage of seeds at low temperature is possible.
Reason : Respiration and anzymatic activity of seeds are very high at low temperature.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false