You can use A.D for before his birth and B.C. for after.
Answer: Drying up of rivers
The river would play the part of the hydrosphere and the drying up of the river plays the part of the atmosphere
I also got it correct on the test :>
Answer:
Memory B cells remain in the body after the immune response is over
Explanation:
Antibodies are substances that are also called immunoglobulins and are secreted by B lymphocytes.
After the penetration of the antigen into the body and its recognition, B lymphocytes are transformed into plasma cells that secrete antibodies against one or more antigens that caused the immune reaction.
In scientific notation, the value of the speed of light in a vacuum
will be written as 2.995 * 10^8. When this value is represented in the form of
a * 10^b, then, a = 2.995 and b = 8.
The value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. In this case, the scientific notation will be written as 3 *10^8.