Answer:
Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes. A human example is cystic fibrosis. A mutation in a single gene causes the body to produce thick, sticky mucus that clogs the lungs and blocks ducts in digestive organs.
Mutations arise spontaneously at low frequency owing to the chemical instability of purine and pyrimidine bases and to errors during DNA replication. Natural exposure of an organism to certain environmental factors, such as ultraviolet light and chemical carcinogens (e.g., aflatoxin B1), also can cause mutations.
only a small percentage of mutations cause genetic disorders—most have no impact on health or development. For example, some mutations alter a gene's DNA sequence but do not change the function of the protein made by the gene.
The 20 minute physical activity I performed was doing yardwork. It was fairly easy to do, besides a lot of bending down involved to pick up sticks. I did it in my front and backyard for a bit over 20 minutes, and no one did it with me.
Burns are classified into four(4) classification, first degree, second degree, third degree and the fourth degree. First degree burns affects only the outer layer of our skin, the second degree affects our epidermis, the third degree destroys the dermis and epidermis and lastly the fourth degree damages the bones, muscles and tendons in our body.
Answer:
Hemorrhage: Bleeding or the abnormal flow of blood. A hemorrhage may be "external" and visible on the outside of the body or "internal," where there is no sign of bleeding outside the body. ... The term "hemorrhagic" comes from the Greek "haima," blood + rhegnumai," to break forth; a free and forceful escape of blood.
Explanation:
Internal bleeding occurs when blood leaks out through a damaged blood vessel or organ. External bleeding happens when blood exits through a break in the skin. Blood loss from bleeding tissue can also be apparent when blood exits through a natural opening in the body, such as the: mouth.
