Explanation:
Skeletal or striated or voluntary muscles are found in the limbs, body wall, tongue, pharynx and beginning of oeso-phagus. These animals are under the control of animals will. Smooth or nonstriated or involuntary muscles are found in the posterior part of the oesophagus, stomach, intestine, lungs, urinogenital tract, etc. Action of these muscles is controlled by autonomic nervous system and they are not under the control of animal’s will. Cardiac muscles are found in the walls of the heart and in the walls of large veins. There fibres show the characters of both unstriped and striped muscle fibres and are involuntary.
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Statement $I$: The cerebral hemispheres are connected by nerve tract known as corpus callosum.
Statement $II$: The brain stem consists of the medulla oblongata, pons and cerebrum.
In the light of the above statements, choose the most appropriate answer from the options given below:
$R -$ In $C_4$ plants photorespiration dose note occur.