EVERYDAY SCIENCE

Detailed explanation-1: -Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane. This gives the plant cell its unique rectangular shape. Animal cells simply have a cell membrane, but no cell wall.

Detailed explanation-2: -The function of the cell membrane is to regulate the flow of water and other material in and out of the cell. It also acts as a protective barrier. Animal cells simply have a cell membrane, but no cell wall.

Detailed explanation-3: -Explanation: Both plant and animal cells contain a nucleus, endoplasmic reticulum, and cell membrane.

Detailed explanation-4: -The cell membrane is found in both animal and plant cell. It prevents the contents of the cell from spreading in all directions and protects the organelles from the external environment.

Detailed explanation-5: -Plant chloroplasts are large organelles (5 to 10 m long) that, like mitochondria, are bounded by a double membrane called the chloroplast envelope (Figure 10.13). In addition to the inner and outer membranes of the envelope, chloroplasts have a third internal membrane system, called the thylakoid membrane.