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.
Compound leaves look like a bunch of leaves that all come from the same stem. However, this stem is really a petiole, and the individual blades connected to it are called leaflets (little leaves).An ash leaf is an example of a compound leaf: In addition to simple and compound leaves, there are some obvious differences in leaf shape.he arrangement of a plantâs leaves on the stem is called phyllotaxy. Though most leaves perform photosynthesis, some plants have modified their leaves to do other things. Cacti are a great example of this: those prickly spines are actually leaves. The green part of a cactus is actually a photosynthetic stem.