The chorion develops from the
a. trophoblast.
b. blastocyst.
c. blastomere.
d. gastrula.
e. morula.
A
You might also like to view...
Gatekeeper genes and caretaker genes are both involved in cancer, but gatekeeper genes can be distinguished from caretaker genes because gatekeeper genes _____ while caretaker genes _____
1.affect the mutation rate of all genes / normally prevent chromosomal instability and aneuploidy 2.mutate to stimulate uncontrolled cell division / encode proteins that limit the rate of cell division 3.control the cell cycle / encode proteins involved in DNA repair 4.all of the choices
Which part of the brain interacts intimately with the limbic system?
a. Broca's area b. the prefrontal cortex c. the cerebellum d. the cingulate gyrus e. the medulla oblongata
Which of the following best describes the condition of a twig if the auxin produced by its apical meristem is conveyed equally down all sides?
A) It will elongate. B) It will branch near its tip. C) It will produce a flower. D) It will bend to one side.
The midclavicular planes pass through the mid- point of the clavicles to the midpoint of which of the following structures?
(A) anterior superior iliac spine (B) symphysis pubis (C) umbilicus (D) inguinal ligament (E) xiphoid process