<p>A leaf is an above-ground plant organ. Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells.</p>
<p>Leaves come in many shapes and sizes. The biggest undivided leaf is that of a giant edible aroid. This lives in marshy parts of the tropical rain forest of Borneo.</p>
<p> One of its leaves can be ten feet across and have a surface area of over 30 square feet.
<p>A leaf is an above-ground plant organ. Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells.</p>
<p>A leaf is an above-ground plant organ. Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells.</p>