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.
Arrangement pattern of the veins of the leaf. 1  The fine lines present on the leaf are called âleaf veinsâ. 2  The single middle prominent vein is known as âmid ribâ or the primary vein.  The veins other than the primary vein are called âsecondary veinsâ.