Which happens during the second trimester?
O A. The vocal cords develop.
O B. The heart...
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Biology, 19.05.2020 04:01 wulfredo67
Which happens during the second trimester?
O A. The vocal cords develop.
O B. The heart starts working.
C. Rhythmic breathing starts.
D. Blood begins to form.
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Answers: 2
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