Question a b c d e

Dear student,

Answer a - 

Atria are responsible for pumping blood into the ventricles. The left atria pumps blood into the left ventricle. Similarly right atria pumps blood to the right ventricle.

Ventricles are responsible for pumping blood to various parts of the body. The left ventricle pumps blood to the tissues of the whole body while right ventricle pumps it to the lungs. This requires greater pressure and force. To withstand this, the walls of ventricles are thicker.

Answer b - 

The plants do not move from place to place, thus amount of energy needed is lower than that of animals. Moreover, many cells are dead like the xylem and phloem fibres, sclerenchyma etc. 
Thus plants have a slower transport system.

NOTE - Kindly post the remaining parts of the question in a new thread.


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