All the solar energy trapped by green plants ultimately returns to the environment'. Comment on this statement.

Maximum solar energy is trapped by

Total amount of energy trapped by green plants in food is called:-

A spacecraft consumes more fuel in going from earth to moon than it takes for a return trip. Comment on this statement.

Modern methods of breeding animals and plants can alleviate the global food shortage '. Comment on the statement and give suitable examples.

When a particle moves with constant velocity, its average velocity, its instantaneous velocity and its speed are all equal. Comment on this statement.

Statement -1: The work done by all forces on a system equals to the change in kinetic energy of that system . This statement is true even if nonconservative forces act on the system. Statement -2: The total work done by internal forces may be positive.

In a way green plants and cyanobacteria have synthesised all the food on the earth. Comment .

Statement-1: Excess of CO_(2) in the air can be removed by green plants . and Statement-2: Green plants absorbs CO_(2) in photosynthesis.

The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about

Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?