The blade is the flattened portion of the leaf. These expanded blades are called lamina which are attached to the plant stem by the petiole. They come in diverse shapes, sizes, and other characteristics. The other choices are just supporting structures of this structure of the plant.
True, organisms take in nitrogen and carry out life processes.
It makes a weird kind of medicine that makes you more healthy, and it eats away rotting wood .etc.
Answer: genetics and mutation generate some of the variety that natural selection acts on
Explanation: