The cell membrane is also called selectively permeable membrane for the sole reason being it is selective in nature.
It forms a physical barrier and as a barrier between the cell and the external environment as it allows only selected necessary molecules to pass through it and at the same time prevents entry of unwanted / unnecessary substances.
It also regulates the entry and exit of molecules into and out of the cell.
The cell membrane permits the entry of vital molecules like
<span>water, oxygen, amino acids and glucose into the cell as they are crucial for various life processes and at the same time metabolic waste products are expelled through the cell membrane.</span>
Answer:
ATP provides the cell with a way to handle energy in an efficient manner. The molecule can be charged, stored, and used as needed. Moreover, the energy from hydrolyzing ATP is delivered as a consistent amount.
<h2>Answer:</h2>
The boiling of water in the iron pan is the activity in which both conduction and convention are used.
<h3>Explanation:</h3>
Energy is transferred from one part of the matter to other part in three ways:
- Conduction
- Convection.
- Radiation.
Conduction is the movement of heat from the collision of the microscopic particles in the matter.
While convection is the transfer from the movement of fluids from one place to another.
In the water boiling activity, the pan is heated by the flame from taking the energy in the collision of atoms in the pan and the energy is transferred into the whole pan and eater molecules. This is conduction while in pan water movement from the bottom to top of pan is by convection.
Answer:
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