Interestingly, although they are all referred to as algae, the red, green and brown algae are classified into three different kingdoms: the protists, chromists and Plantae, respectively. The algae all have cell wall structures and are capable of photosynthesis like our plants on land.nterestingly, although they are all referred to as algae, the red, green and brown algae are classified into three different kingdoms: the protists, chromists and Plantae, respectively. The algae all have cell wall structures and are capable of photosynthesis like our plants on land.
You put documents in a folder for storage; a letter would go in an envelope.
The difference in the number of the page sizes equals the number of times you should fold it. So if you have a C4 or B4 envelope and a sheet of A2 paper, you should fold it in half twice. The same method works for filing larger paper sizes in file folders of a smaller size. This works with the B and C envelope formats.