What does the embryonic neural tube develop into?
A. The liver and spleen
B. The brain, spinal cord, and vertebrae
C. The digestive tract
D. The brain and spinal cord
E. The vertebrae
Answer: D
You might also like to view...
Specialized ________ in the carotid and aortic bodies are activated by a decrease in PO2 and pH or an increase in PCO2. What do they trigger?
Fill in the blank(s) with the appropriate word(s).
Which of the following helps return blood to the heart?
A) Positive intrathoracic pressure B) Contracting skeletal muscles C) Capillary action D) Valves in the arteries
In both genders, the development of axillary hair signals the onset of puberty.
Answer the following statement true (T) or false (F)
When one atom has a stronger attraction for shared electrons than the other atom, a(n) ________ covalent bond is formed.
A. nonpolar B. polar C. metallic D. ionic