Information is gathered by using human senses and various instruments such as magnifying lenses, microscopes, telescopes, thermometers, scales, and balances. Today we will be discussing and viewing pictures in which we see the sequence and progression of a cell to an organism. All living things are made of cells and these cells transform into an organism. Name an organ that can be replaced in today's modern medical world. Cells are the smallest units that make up the body.
Every organism begins as a single cell.
Some living things are only one cell. You might see a one cell animal in a pond or lake water. Place a drop of water on your slide. See if you can identify one of the one cell animals I have drawn on the board. Draw a diagram of the animal you see.