The B cells are not considered as first line defense structures of the immune’s system
Answer: Option C
<u>Explanation:</u>
Our body is protected internally by nature by many layers of defense. Any microbe or a foreign material that disturbs the body is defended by these barriers.
The first layer of defense required physical and chemical barrier such as the skin, mucous membrane, tears, saliva etc . The second line defense system involves the cells and the tissues that protect the body.
We've had the same amount of water on our planet since the beginning of time. Even though 70 percent of the globe is covered in water, less than 1 percent is accessible to us.
But now there is 6.7 billion people using that water. We're on track to be up to 8 billion people in 15 years. With our current population, there is already water stress.
Answer:
Get your supplies. . To make a DNA model out of clay, you will need to first purchase your clay of choice. A polymer...
Create your nitrogenous bases. . There are four nitrogenous bases that make up a strand of DNA: cytosine, guanine,...
Twist the double helix. . To give your DNA model the classic spiral shape, hold your double helix at both...
Answer:
KLJ & EFH
Explanation:
Right angles have a 90° angle
<span>The role that Stratigraphic dating have played in determining the occurrence of mass extinctions is in its ability to identify different sediment debris. This includes rock and other materials that form or accumulate as the result of natural processes, human activity, or both</span>
