Answer:
These are the factors that restrict the size of a cell:
-Surface area to volume ratio
-Nucleo-cytoplasmic ratio
-The fragility of the cell membrane
-Structures of the cell
The reason that the cell can grow to a certain limit is its surface area to volume ratio. For example as you air a balloon it expands to a certain volume but there is a limit you can fill air inside the balloon otherwise it will blast.
Explanation:
One major difference between these secondary lymphoid organs is the mechanism by which antigens or pathogens enter the organ.
Naive T cells can develop into effector and memory T cells, which remove the triggering antigen in peripheral tissues and produce protective immunity, with the help of secondary lymphoid tissues.
The spleen, which collects bloodborne antigens, the lymph nodes, which deal with antigens found in peripheral tissues, and the mucosa-associated, bronchial-associated, and gut-associated lymphoid tissues where antigens from epithelial surfaces are collected are examples of secondary lymphoid organs.
Therefore, One major difference between these secondary lymphoid organs is the mechanism by which antigens or pathogens enter the organ.
Learn more about secondary lymphoid organs here:
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Answer:
The magnetic field of Earth is caused by currents of electricity that flow in the molten core. These currents are hundreds of miles wide and flow at thousands of miles per hour as the earth rotates. The powerful magnetic field passes out through the core of the earth, passes through the crust and enters space.
Answer:
I think it is Physical change
Answer:
Green, red or orange
Explanation:
Benedict's solution is used to test for simple sugars, such as glucose. It is a clear blue solution of sodium and copper salts. A potion of sugar solution is added an equal amount of benedict's solution and heated to boil. In the presence of simple sugars, the blue solution changes color from blue to green, yellow, and red, depending on the amount of sugar. When the solution turns to orange, it indicates that there is presence of reducing sugars.
