Answer:
<em>The correct options are B and C</em>
Explanation:
Option A is false because bacteria fix nitrogen by converting it into ammonia. The ammonia is used by the plants for different functions like development etc.
Option B is correct because plants can take up both ammonium ions and nitrate ions from the soil. They use these ions to make amino acids which are required by the plant for different activities.
Option C is correct because nitrifying bacteria are the bacteria which convert ammonia into nitrites and then nitrates in a process which is termed as nitrification.
Option D is false because herbivores eat plants to make amino acids and proteins.
- 24 micron m^2 represents the value of the surface area.
- Surface area has unit of m^2.
<u>Answer:</u>
<u>surface area</u>
Hope you could understand.
If you have any query, feel free to ask.
Answer;
Semi-permeability means that only certain molecules are allowed to pass through.
Explanation;
-Semi-permeability is one of the features of a cell membrane, which means that the membrane allows selective movement of materials in and out of the cell; that is only certain molecules can enter or leave the cell.
-For example smaller molecules such water and ions such as potassium and sodium ions are able to leave and enter the cell, while other molecules that are large such as protein molecules can not enter or leave the cell.
There may be many forms of a single gene. Each such form is called an allele
