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.
Spiral : ( one or more leaves per node ) When a spiral pattern is formed when an imaginary line is drawn which connects progressively older leaf origins on the stem. 3. Opposite : ( two leaves per node ) When two leaves arise at each node opposite to each other the phyllotaxy is opposite. When each pair at each node is placed at right angles to one another the condition is opposite decussate e.g. Calotropis, Guava etc. If all the pair occur in same line the phyllotaxy in opposite superposed e.g. Jaman. 4. Whorled : ( three or more leaves per node ) When more than two leaves arise at each node in a whorl the phyllotaxy is whorled e.g. Oleander.