The function of leaves is to help the plant produce food by converting the energy in sunlight into chemical energy that the plant can eat. The structures within the leaf convert the energy and make it possible for the plant to get food.Know More
Chlorophyll is the molecule in the structure of the leaves that takes the energy in sunlight to turn water and carbon dioxide gas into sugar and oxygen gas. This conversion process is known as photosynthesis.
Leaves are made out of several layers that are in between two layers of super tough skin cells called epidermis. The epidermis is also known to secrete cuticle, which is a waxy substance. All of these layers protect the leaf from pests such as insects and bacteria. There are also stomata cells that are pores where gases can enter and exit through the leaf.
Most of the food production in the leaf actually takes place in the elongated cells that are known as palisade mesophyll inside the leaf. The leaf also has veins that can help to support the leaf by transporting food, water and minerals to the leaf and to the plant.
Leaves are also important for humans as they are one of the best ways to identify various plants. Leaves come in many shapes and sizes, such as flat, wide, spiky, thin, rectangular and oval.Learn More
Willow trees form a large portion of the genus Salix. The most common willow trees include the black willow (Salix negra), white willow (S. alba) and weeping willow (S. babylonica).Full Answer >
Curled, wilted or distorted leaves, along with dark or tarlike spots are common symptoms of dogwood anthracnose. Drought and winter injuries weaken trees, and the anthracnose fungus mostly attacks during the cool, wet spring and fall weather, but it can occur during any season.Full Answer >
Chloroplasts contain multiple structures, including the membrane envelope, stroma, grana, thylakoid membrane and chlorophyll. Choloroplasts are the organelles within plant cells where photosynthesis takes place.Full Answer >
Catnip, also called catmint, is a member of the mint family that is known to repel mosquitoes. A study headed by researchers from Iowa State University found that nepetalactone, an essential oil found in catnip, was 10 times more effective than DEET, a compound found in commercial insect repellents.Full Answer >