They are the source of principle food for humans and animals. They are a big link in the base of the food chain. They are too hard to tell apart. Although some may look the same, at closer inspection, each type of grass has it's own unique characteristics. Grasses grow everywhere in the world, from the Arctic Circle into the jungles near the equator.
Grasses are most abundant in prairies, savannas, steppes, and other open habitats.
Some grasses are better suited for wet environments, including salt water, fresh water, and still or running water. Some even float on the water's surface and don't even touch the ground. As you can see, grasses can grow in very different environments. The grass plant is made up of stems, leaves, roots, and fruiting structures. The internode is the area between the attachment of the leaves.