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lilobekker6976
25.11.2021 •
Biology
Mothers who consume excessive alcohol during pregnancy may have babies who are affected with a pattern of physical and mental disabilities known as fetal alcohol syndrome. Similarly, mothers who become addicted to drugs during pregnancy may have babies who show signs of addiction. Which of the statements properly describes why these are not examples that contradict the statement that traits acquired by the parents are not transmitted to the offspring?
a. All tissues of the mother and child can be affected by exposure to drugs or alcohol as long as they pass through the placenta into the fetus.
b. All of these choices are correct.
c. Though gene expression patterns in the child may be affected by maternal drug or alcohol use, those changes result from epigenetic or environmental changes and not from mutations.
d. Maternal drug or alcohol use does not alter the genome sequences of the child.
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Ответ:
(D)
Explanation: Oceanic crust refers to the thin, underwater crust which is about 7-10 km thick.
The red curved line in the map provided is the Mid-Oceanic ridge (MOR), which is here known as the Mid-Atlantic ridge, and is the result of the divergent plate boundary where the two plates move away from each other in the opposite direction.
Thus, the correct answer is option (D).