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.
Answer: Low intensity (Option 2)
Explanation:
The overload training principle includes four categories:
1. Frequency
2. Intensity
3. Time
4. Type
As the options involve frequency and intensity let’s see what they both mean:
Frequency is defined as how often or how many times you exercise per week. Your frequency depends upon the level of your training. It is recommended to exercise three to four times a week.
Intensity means, how hard you are exercising. an it is classified as low, medium or high. So during really easy workouts you are at the lowest intensity.
