AP BIOLOGY

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CELL DIVISION

MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A group of scientists test three different types of cells-muscle cells, nerve cells, and skin cells-to find out which cell type goes through the steps of mitosis the fastest. The scientists time 100 cell divisions for each type of cell. The temperature and amount of light is the same for all of the cells. What is a controlled variable (or constant) in this investigation?
A
The speed of the divisions
B
The types of cells
C
The temperature
D
The age of the scientists
Explanation: 

Detailed explanation-1: -Mitosis happens in all eukaryotic cells (plants, animals, and fungi). It is the process of cell renewal and growth in a plant, animal or fungus. It is continuously occurring throughout our bodies; it is even happening while you are reading this.

Detailed explanation-2: -Skin cells, red blood cells or gut lining cells cannot undergo mitosis.

Detailed explanation-3: -These phases are prophase, prometaphase, metaphase, anaphase, and telophase. Cytokinesis is the final physical cell division that follows telophase, and is therefore sometimes considered a sixth phase of mitosis.

Detailed explanation-4: -Cytokinesis is the right answer. Cytokinesis is the process of cytoplasm division. It occurs at the final stage of mitosis, an asexual cellular division process. Prophase, Anaphase, Metaphase and Telophase are the 4 stages of mitosis.

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