Question

Briefly describe the five stages of the cell cycle?

Answer 1

1. Interphase : The cell copies its DNA in preparation for mitosis. This phase is divided into 3 shorter phases : G1, S and G2.
2. Prophase : The chromosomes start to condense and the nucleolus disappears. The nuclear envelope breaks down.

3. Metaphase : Chromosomes align at the metaphase plate which is the centre of the cell.

4. Anaphase : Chromatids of each chromosome are separated and start migrating towards opposite poles of the cell.

5. Telophase : Nuclear membranes reappears, one for each set of chromosomes. Chromosomes decondense.

Answer 2

Explanation:

A projection keyboard is a form of computer input device whereby the image of a virtual keyboard is projected onto a surface: when a user touches the surface covered by an image of a key, the device records the corresponding keystroke.