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.
Stomata are present in the sporophyte generation of all land plant groups except liverworts. Dicotyledons usually have more stomata on the lower epidermis than the upper epidermis. Monocotyledons, on the other hand, usually have the same number of stomata on the two epidermes.In plants with floating leaves, stomata may be found only on the upper epidermis and submerged leaves may lack stomata entirely.onocotyledons, on the other hand, usually have the same number of stomata on the two epidermes. In plants with floating leaves, stomata may be found only on the upper epidermis and submerged leaves may lack stomata entirely.