One week after conception, a ball of 100 cells becomes firmly embedded in the lining of the uterus in the process of implantation. This ball of cells is called the
A) zygote.
B) prenatal period.
C) fetus.
D) embryo.
E) blastocyst.
Correct Answer:
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Q1: The weeks that precede and follow an
Q2: During the time when a woman's egg
Q3: Fred and Ted are identical twins. This
Q4: The placement of a man's sperm into
Q6: The process of implantation involves the
A) zygote
Q7: What is the name of the membrane
Q8: During the embryonic period, cells of the
Q9: As an infant, Sarah began to hold
Q10: As an infant, Bryan started using his
Q11: When Juan witnessed the birth of his
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