Cells differentiate during development because
A) genes respond only to influences outside the mother's body.
B) in each cell only some of the genes are expressed.
C) each cell contains only a portion of the genes.
D) chemicals in the sperm cytoplasm determine which cells develop.
Correct Answer:
Verified
Q25: A human embryo is known as a
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Q27: Based on experiments with amphibian embryos, Spemann
Q28: In humans, implantation occurs
A) when the embryo
Q29: Induction refers to
A) the formation of the
Q31: The birth defect spina bifida results in
Q32: The umbilical cord of a mammal connects
Q33: In humans, fertilization occurs in the
A) testes.
B)
Q34: The proteins that bind to the DNA
Q35: What makes the cells of a developing
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