Question

1. Assertion (A): Unisexual flowers have separate male and female flowers.
Reason (R): Cucumber, pumpkin and watermelon are example of unisexual flowers.
2. Assertion (A): Units which make up the nervous system are called neurons.
Reason (R): Nerve impulses are carried by dendrites towards the cell body.
3. Assertion (A): Refractive index of glass with respect to air is different for red light and violet light.
Reason (R): Refractive index of a pair of media depends on the wavelength of light used.​

Answer 1

Explanation:

1. REASON IS TRUE BUT ASSERTION IS ALSO TRUE

2.ASSERTION IS CORRECT BUT REASON IS NOT THE CORRECT EXPLANATION

3.BOTH ASSERTION AND REASON ARE TRUE

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Answer 2

1. both the assertion and reason are true.

2. both the assertion and reason are true.

3. both the assertion and reason are true.

Explanation:

1. Unisexual flowers are the flowers that contain only one kind of the reproductive organ in a flower (usually same kind on one plant) whereas the bisexual flowers have both the male and the female reproductive plants in the same flower, such living beings are also called hermaphrodite.

2. The fundamental structure of the nervous system is made up of neurons which transfer nerve impulse to the other cells.

There are three types of neurons:

• Sensory neurons, carry nerve impulse to spinal cord from various tissues and organs.

• Motor neurons, carry nerve impulse to muscles and glands form brain and spinal cord.

• Inter-neurons build up communication between sensory and motor neurons.

3. The light when passes through an optically denser medium then its wavelength shrinks and while its amplitude increases so its frequency remains the same. The refractive index when measured with different wavelength of the light behaves differently for the same medium.

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