Examlex
Which statement is true?
Trophoblast
The outer layer of cells surrounding a blastocyst in early development, which contributes to the placenta and provides nutrients to the embryo.
HCG
Human chorionic gonadotropin (HCG) is a hormone produced by the placenta after implantation.
Neural Tube
The embryonic precursor to the central nervous system, which includes the brain and spinal cord, formed from the folding and closure of a flat sheet of cells in the early embryo.
Neural Groove
A fold in the neural plate during embryonic development, which deepens to form the neural tube, ultimately developing into the central nervous system.
Q48: After posing a question, a researcher using
Q74: A little boy who prefers to dress
Q80: Parents who have low expectations for maturity
Q90: New concepts are best learned when they
Q93: Jameel has a college degree, lives in
Q115: A child with learning or behavioral difficulties
Q131: Dr. Hide is a nutritionist, Dr. Sparrow
Q143: Li, age 11, is a recent Chinese
Q166: Excessive drinking during pregnancy can cause fetal
Q271: According to the social learning theory of