This affects facial development and it's a change in the gene in chromosome 5
What they mean by "base" is the substance. A base is a substance that tastes bitter, has a pH that is greater than 7. It also turns red litmus paper blue.
In conclusion, what they mean by 'base' is the substance included.
The nucleus controls everything in the cell
when the fetus is exposed to a teratogen during the embryonic period is delay in growth
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What are some teratogens that affect the fetus?</h3>
Teratogens are any agents that cause an abnormality in a foetus after exposure during pregnancy. Teratogens are typically discovered following an increase in the prevalence of a specific birth defect. In the early 1960s, for example, thalidomide was used to treat morning sickness. The early exposure of the foetus resulted in cases of phocomelia, a congenital malformation in which the hands and feet are attached to abbreviated arms and legs.
Teratogens can also be found in the home or at work. The effect is dependent on the type of agent, dose, duration, and time of exposure. The first half of a pregnancy is the most hazardous. Infectious agents (rubella, cytomegalovirus, varicella, herpes simplex, toxoplasma, syphilis, and others) .
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