Biology, 04.11.2020 18:20 saraagracee

Which best describes fetal development? The heart beats and is heard during the first trimester.
The heart beats and is heard during the second trimester.
The heart beats during the first trimester, but is heard in the second trimester.
The heart beats during the second trimester, and is heard in the third trimester.

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Which best describes fetal development? The heart beats and is heard during the first trimester.

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