<span>In real life, the presence of friction. Choice B</span>
23, half of the total. This is because a zygote receives 23 from the mother and 23 from the father.
Answer:Aging. ...
Family history. ...
Smoking. ...
Alcohol. ...
Sunlight and ionizing radiation. ...
Organic and inorganic chemicals. ...
Viruses and Bacteria. ...
Hormone therapy.
Explanation: