Healthy adults aged 19-64 should do at least 150 minutes of moderate aerobic activity such as cycling or brisk walking every week as well as <span>strength exercises on two or more days a week that work all the major muscles. They could instead do </span><span><span>75 minutes of vigorous aerobic activity, such as running or a game of singles tennis every week, as well as </span>strength exercises on two or more days a week that work all the major muscles. They could even do a </span><span><span>mix of moderate and vigorous aerobic activity every week. </span></span>
C. Mina listens without interrupting the person. She gives appropriate suggestions.
Please correct me if I'm wrong!!
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Hello There! ^_^
Your question: As an infant, the ability to produce antibodies is..?
Your answer: As an infant, the ability to produce antibodies is limited.
The answer is option C.
Happy Studying!
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.