Answer:
A polyhydroxyl alcohol is an alcohol that has two OH molecules attached. A regular alcohol has only one
Explanation:
Answer:
Stimulate an immune response
Explanation:
The vaccine is a preparation that contains a weakened or killed form of microorganism (or part of them) that stimulates the immune system to produce memory antibodies to recognize that microorganism in the future. After the body produces the memory antibodies, if a person is in contact with that microorganism the body recognized them as “strange” and the body response to killing them is faster before the infection. In some cases is necessary to apply various doses of the vaccine in a certain time to maintain the memory antibodies.
D. successive generations of offspring
Answer:
A “mutation” changes the instructions of a gene, which can also change the protein. Sometimes this change makes it so the protein can't do its job as well. And this is what happens with sickle cell anemia. A mutation in the hemoglobin gene changes the hemoglobin protein in a way that causes sickle cell anemia.
Answer:
RBC burst when placed in pure water , Ans C -The water rushes into the cell. Cell swells and burst.
Explanation:
This can be understand by understanding OSMOSIS
Movement of water molecule from its higher concentration to its lower concentration through a semipermeable membrane is called OSMOSIS.
If cell is placed in any solution in which solute concentration is higher than inside the cell (HYPERTONIC SOLUTION), means water content in cell is higher then outside environment. Then the water molecule will flow from cell to the outer medium. Water molecule movement continues till concentration of solutes reaches same both in cell as well as in medium.
IF cell is placed in any solution having solute concentration lower than inside the cell. In this solution water content will be higher and solute concentration will be low (HYPOTONIC SOLUTION). Water movement will be inside the cell from the outer environment.<u><em> As the result Cell swells and ultimately burst because of excess water content.</em></u>
IF cell is placed in ISOTONIC SOLUTION, where concentration is same both in cell and outer environment, No movement of water molecules takes place.
