he term "archenteron" refers to the developing:a
gut.
b. lung.
c. notochord.
d. nerve tube.
e. skin.
A
You might also like to view...
Which of the following is NOT a valid distinction between a blastocoel, an archenteron, and a coelom?
A. During development these cavities appear in the sequence blastocoel, archenteron, coelom. B. The blastocoel forms the cavity of the digestive tract, the archenteron forms the chest cavity, and the coelom forms the cavity of the digestive tract. C. The blastocoel is bounded only by an external germ layer, the archenteron is bounded by inner and outer layers of germ cells, and the coelom is a cavity within the mesoderm. D. The archenteron has a direct opening to the outside of the embryo whereas the other two cavities do not. E. None of the other choices are correct.
The five different immunoglobulin classes are distinguished by their
a. CH regions. b. C? regions. c. D regions. d. JH regions. e. VH regions.
Which of the following can cause primary immunodeficiencies?
A) aging B) medical interventions C) infectious agents D) systemic disorders E) congenital immunodeficiency
Ionotropic receptors act by activating G proteins in target cells.
Answer the following statement true (T) or false (F)