Which of the following statements about a blastocyst is true?
A) It consists of a single cell.
B) By the fourth day, it is a hollow, fluid-filled ball made up of 60 to 70 cells.
C) It is a membrane that helps to keep the temperature of the prenatal world constant.
D) It is connected to the developing organism by the umbilical cord.
Correct Answer:
Verified
Q5: The trophoblast
A) develops into the nervous system
Q6: The ectoderm folds over to form the
A)
Q7: Lanugo
A) permits food and oxygen to reach
Q8: The _ surrounds the amnion.
A) placenta
B) yolk
Q9: The groundwork is laid for all body
Q11: The ovum
A) measures around 1/500 inch.
B) is
Q12: The _ secretes hormones that prepare the
Q13: The yolk sac
A) delivers food and oxygen
Q14: While the senses of sight and sound
Q15: During Michelle's _ month of pregnancy,the eyes,ears,and
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