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 groups of lettuce categorized by head formation or leaf type. Each of these lettuce varieties offers a unique flavor and texture, and growing different types of lettuce will be a surefire way to generate interest in eating a healthy diet.Letâs learn more about the different lettuce types.risphead lettuce, more commonly known as iceberg, has a tight head of crisp leaves. Often found in the local salad bar and a virtual staple in the delicious BLT, it is actually one of the more difficult lettuce varieties to grow.