¿Que se mide con una caloría?

Una caloría es una unidad de medida de energía. Muy específicamente, es la cantidad de energía que se requiere para elevar la temperatura de un ml (que también es un gramo) de agua en un grado Celsius.

en inglés, (In English)

A calorie is a unit of measure of energy. Very specifically, it is the amount of energy that is required to raise the temperature of one mL, (which is also one gram), of water by one degree Celsius.

The stomata are present on the plant body which are mainly regulated by the chemical balance( sugar level) inside the stomata's body. As, during the transpiration process the loss of excessive amount of water occurs which is required for the osmoregulation of the plants body. Now, when the stomata are mostly light sensitive and it loses it turgidity then the cells become much flattened and thus it closes to stop the process of transpiration. Which, brings about the increase of the water level or balance inside the plants body, which is required for better or proper mechanism.And, for that reason the requirement or need for more water molecules will end, as the plant roots will now stop absorbing any more water molecules from the soil.