If there was no $CO_2$ in the earth’s atmosphere, the temperature of earth’s surface would be
Same as present
Less than the present
Higher than the present
Dependent on the amount of oxygen in the atmosphere
$A$ : The soil of tropical rain forest has low base content.
$R$ : Such soil shows less percolation and leaching
Below is the diagramatic representation of response of organisms against temperature. Find out the correct match.
The salinity in sea water in parts per thousand $(ppt)$ ranges between