Askjagden's Guide to Biology: Introduction to the Cell
Robert Hooke introduced the term "cell" to describe this important term in biology. What I shall show you will be very satisfactory.
Here is a theory I shall introduce. This theory is called the cell theory. This theory defines what the cell is and what the properties of the cell are. The cell theory states that all living things are composed of cells, cells are the basic units of structure and function in living things, and new things are produced from existing cells. Here, you can infer that the literal definition of a cell is the basic unit of life. If anything is made up of cells, then it is living.
Cells can be divided into two categories: ones that do have nuclei, and ones that do not have nuclei. Nuclei is the plural form of nucleus, which is a structure enclosed by a membrane (called a "nuclear membrane" and made up of two layers of lipids) that is the part of the cell that contains all of the nucleic acids and that is the "brain" of the cell.
Cells that do have nuclei are called eukaryotes. Cells that do not have nuclei are called prokaryotes. Eukaryotes are complex, while prokaryotes are not complex. How, you may wonder, do prokaryotes manage themselves if they do not have nuclei? Their genetic info, you see, is spread out in the cell.
Have fun with biology!
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Askjagden's Guide to Biology: Introduction to Cytology
Non-FictionWhat is cytology? Cytology is the study of cells, and it is a very significant topic in biology. Cells, you see, are the basic units of life. Because of this, cytology deserves its own specific chapter in a book. Enjoy!
