The marine biologist job outlook includes some growth, but with strong competition for jobs. If you are passionate and dedicated, you can make this a lifelong career. Marine biologists study ocean life, conducting research on aquatic plants and animals.
3. Leaf Arrangement (Phyllotaxy) Three different leaf arrangements: Alternate (one leaf per node), opposite (two leaves per node) and whorled (three or more leaves per node). A node is the place where one or more leaves are attached along the stem. The area between the nodes is called the internode.
There are five distinct types of lettuce: leaf (also called loose-leaf lettuce), Cos or romaine, crisphead, butterhead and stem (also called asparagus lettuce). Leaf lettuce, the most widely adapted type, produces crisp leaves loosely arranged on the stalk.Nearly every garden has at least a short row of leaf lettuce, making it the most widely planted salad vegetable. Cos or romaine forms an upright, elongated head and is an excellent addition to salads and sandwiches.t is a head lettuce that is also low in nutritional value and flavor. Because of its superior shipping qualities, iceberg has been most available which accounts for it popularity. The most abundant nutrient in iceberg lettuce is water.