A new report explains why many Americans can't afford the average new car. Mar 16, 2014 at 3:30PM. Ford's F-150 is America's best-selling new vehicle. But at an average transaction price of close to $40,000, it's out of reach of many American households -- or should be, says a new report.
How to Calculate Leaf Surface Area. The rate of transpiration is measured as the amount of water lost/ square meter/ minute. Because water evaporates through the many stomata on the leaf surface, the rate of transpiration is directly related to the surface area. To arrive at the rate of transpiration, therefore, you must calculate the leaf surface area of each plant: Because most stomata are found in the lower epidermis, you will determine that surface area. 1  Lay the leaves to be measured on a 1-cm grid and trace their outlines. 2  Count the number of square centimeters.
There are numerous, minute openings present on the leaves, called stomata, through which gaseous exchange takes place between the atmosphere and the plant body. C. Evaporation of water. Water absorbed by the root hairs of the plant is evaporated from the leaf surface during the day time. It generÂ­ally takes place through the stomatal openings. The phenomenon is known as transpiration. This process allows the plant to absorb water and minerals from the soil and conduct the same to the top of the plant. D. Storage of food. Fleshy leaves of Indian aloe, Portulaca and fleshy scale leaves of onion store food materials and water for the future of the plants.