Assertion and Reason
9. A: molecular movements are needed for life.
R: Body structure made up of these molecules need continuous repair and maintenance
10. A: Diffusion does not meet high energy requirement of multicellular organisms.
R: Diffusion is a fast process but occurs only on the surface of the body.
Answers
Answer:
9. A&R are correct and R is the correct explanation of A
,10. A is correct but R is false
Explanation:
Answer-
The correct answer to the assertion and reason is-
Both the assertion and reason are correct but the reason is not the correct explanation of the assertion .
Explanation:
Here ,both the assertion and reason are correct but the reason is not the correct explanation of the assertion .
Assertion: molecular movements needed for life
Movement of molecules are essential as it repairs and give structure to the whole body. It is important to carry out various metabolic reactions (like respiration,etc) as every action requires movement of molecules, and they are very important and necessary for life. This is a continuous process.
Therefor, body structure made up of these molecules need continuous repair and maintenance
Assertion: Diffusion does not meet high energy requirement of multicellular organisms.
Diffusion can be defined as the movement of the particle from the region of the higher concentration to the region of the lower concentration with solute particle movements.
Therefore, diffusion is a very fast process.
The energy requirement of diffusion is very low as compared to Osmosis or active transportation. diffusion takes place fastest in case of gases and slower in liquids and slowest in solids