The generally widely accepted first step of the scientific method is to ask a question.
This is where you think of a question which you want to do an experiment on, and then later on conduct an experiment to answer that question.
They use carbon dioxide for photosynthesis in return this makes oxygen for us to breath
Roughage, also known as Dietary Fiber is the indigestible part of a plant.
The correct option for above statement is:
c.cell membrane
The cytomembrane (plasma membrane) could be a skinny semi-permeable membrane that surrounds the protoplasm of a cell. Its operate is to shield the integrity of the inside of the cell by permitting sure substances into the cell, whereas keeping different substances out. It conjointly is a base of attachment for the complex body part in some organisms and therefore the cell membrane in others. So the cytomembrane conjointly serves facilitate support the cell and help maintain its form.