Biology, 11.02.2021 23:30, kingethan08
When a human embryo develops, it produces a special type of hemoglobin not found in infant, child, or adult blood.
Which statement best explains how an embryo can produce a different type of hemoglobin from that of an infant, a child, or an adult?
A.) Humans have genes for different types of hemoglobin, and they are expressed at different times.
B.) Human genes change slowly as a person ages.
C.) An embryo and an adult have different genes for hemoglobin.
D.) As the embryo develops and cells differentiate, certain genes are lost.
Answers: 2
Biology, 22.06.2019 01:20, kylemartinez13
Which of the following is not considered an appendage of the skin? nails glands follicles none of the above
Answers: 2
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