When does the embryonic period officially begin?
A. At fertilization
B. At the time of implantation
C. With the onset of cleavage
D. With the establishment of the three primary germ layers
E. When the umbilical cord becomes functional
Answer: D
You might also like to view...
Growth hormone
a. directly stimulates bone growth. b. exerts its effects on bones via somatomedin release. c. promotes closure of the epiphyseal plate. d. both (a) and (c) above. e. both b) and (c) above.
The nerves that supply the lower limbs enter or exit from this area of the spinal cord.
A) brachial plexuses B) cervical enlargement C) cervical plexuses D) lumbar enlargement
Which antibodies are found in colostrum?
A) IgG B) IgD C) IgM D) IgA
On which day of the female's uterine (menstrual) cycle does ovulation typically occur?
A) day 7 B) day 14 C) day 21 D) day 24 E) day 28