This sounds like exponential growth. It’s the type of growth you will see in bacterial colonies (for one example) because they grow and multiply so fast.
Answer: Rural children are in contact with many allergens that train their immune systems. While Urban children are exposed to chemical pollutants that sensitize their immune systems and make them more prone to allergies.
Explanation:
An allergy is a reaction of your immune system to something that doesn't bother most other people. Allergy sufferers are often sensitive to more than one thing. For example, pollen, bee venom, pet dander or a food that does not cause a reaction in most people.
<u>The purpose of the immune system is to defend the body against harmful microorganisms such bacteria, viruses, and fungi.</u> The immune system produces substances known as antibodies, and in this type of reaction the antibody that is produced is called immunoglobulin E (IgE).<u> When you have allergies, your immune system produces antibodies that identify a particular allergen as harmful, even if it is not</u>. When you come into contact with the allergen, your immune system's reaction can cause the skin, sinuses, airways, or digestive system to become inflamed.
There are now many studies showing that <u>contact with the rural area in the first years of life reduced the risk of developing allergies in the population</u>. This is because children are in contact with allergens. <u>Urban children are exposed to chemical pollutants that sensitize their immune systems and make them more prone to allergies</u>. As it was said, when a susceptible person is exposed to an allergen, the body produces IgE. The next exposure may result in an allergic reaction which produces even more amounts of IgE. <u>But this happens when there is an exaggerated and unnecessary reaction on the part of the immune system, because the person is also in contact with toxic and chemicals that affect the immune system, and make it not work properly.</u>
B. Without enzymes, chemical reactions would not occur quickly enough to sustain life.
Answer: Hydrosphere
Explanation: The hydrosphere is all the water such as lakes and rivers.
It also includes all the gas clouds because water can be solid, liquid, or gas
so oceans, ice caps, and water vapor is included.
Answer:
Root hair cells are outgrowths at a tip of the plant's roots. Root hair cells vary between 15 and 17 micrometres in diameter, and 80 to 1,500 micrometres in length.