Question

1. Why is a cell called the structural and functional unit of a living organism?
2. Why is the cell membrane called a selectively permeable membrane?​

Answer 1

Answer:

1.  The cell is called the structural unit because the body of all orgnanisms is made up of cells. It is the functional unit of life because is responsible for carrying out the various processes characteristics of the organism.

2.  A cell or plasma membrane is called "selectively permeable" because it is selective about what it allows to pass through it.

Answer 2

Answer:

Explanation:

ANSWER:

1.Cell is the Structural and Functional unit of Living organism due to the following reasons:-

• All various types of life processes such as respiration, digetion, excretion etc. all are carried out by the cells of the body.
• All living organisms be it is unicellular or multicellular, they are made up of building blocks cells

2. Cell membrane or Plasma Membrane is called Semi permeable because:-

• It allows entry and exit of only selected nutrients which are requirec by the cell.
• Cell membrane does not allow any other substance to get in
• If this happens also, Lysosomes, or the suicide bags of the cell destroy the cell by blasing it hence the nutrients which were not required gets out.

Know More:-

THE CELL WALL:-

• The plants are weak and do not have skeletal protection
• Hence the cells of plants are covered by the cell wall, made of cellulose which gives a skeletal support to the fragile cells of the plant.

CELL ORGANELLES

• The organelles are the main part of the cells
• These help to carry out the cell its specific function
• Organelles examples are - Mitochondria, Golgi Apparatus, Lysosome, Centriosome and Vacoules.