Assertion: The nervous system of cockroach is spread throughout the body.
Reason: Three ganglia lies in the thorax and six in the abdomen.

Assertion (A): Baltic Sea, remains open for international trade throughout the year. Reason (R): Baltic Sea lies in the warm temperature zone.

Assertion: Centre of mass of a rigid body always lies inside the body. Reason: Centre of mass and centre of gravity coincide if gravity is uniform.

Read the assertion and reson carefully to mark the correct option out of the options given below: Assertion : In man , only peripheral nervous system is present . Reason : The peripheral nervous system includes nerves coursing between the central nervous system and and different parts of the body .

Assertion : - Circulatory system of cockroach does not contain any capillary. Reason :- Blood of cockroach does not contain any respiratory pigment.

Assertion (A): Cockroach can survive without a head. Reason (R): A cockroach can live for a week without its head. Due to their open circulatory system, and the fact that they breathe through little holes on each of their body segements.

Assertion : - Circulatory system of cockroach does not contain any capillary. Reason :- Blood of cockroach does not contain any respiratory pigment. (a) If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion. (b) If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. (c) If Assertion is True but the Reason is False. (d) If both Assertion & Reason are false.

Assertion : In Rutherford's alpha -particle scattering experiment, most of the alpha -particles were deflected by nearly 180^(@) . Reason : The positive charge of the atom is spread throughout the atom that repelled and deflected the positively charged alpha -particles.