True or False
In a symport both in molecules cross the membrane in the same direction termed symport and if they move in opposite direction it is termed antiport.

Simultaneous movement of two molecules across a membrane in same direction is known as:

True or False Both the auricles of the amphibian heart open into the same ventricle.

A and B are two points of 150 km apart on a highway. A car starts from A and another from B at the same time. If they move in the same direction, they meet in 15 hours, but if they move in opposite direction, they meet in one hour. Find their speeds.

Do you see them moving in the direction opposite to your motion?

State whether the following statement is true or false-"When a person walks on a rough surface,the frictional force exerted by the surface on the person is opposite to the direction of his motion".

What is the shape of the wave when two wave pulses travelling in the opposite direction cross each other?

Two parallel beams fo positions moving in the same direction will