Identical twins involve ________ egg(s) and ________ sperm.
A. one; one
B. two; one
C. one; two
D. two; two
Answer: A
You might also like to view...
____________________ anemia results from the failure of the bone marrow to produce sufficient numbers of red blood cells
Fill in the blank(s) with correct word
Which of the following areas of the brain are involved in developing motor programs?
a. supplementary motor cortex b. premotor cortex c. posterior parietal cortex d. cerebellum e. All of these.
Nicotinic receptors
A) respond to epinephrine. B) respond to norepinephrine. C) open chemically-gated sodium ion channels. D) can be either excitatory or inhibitory in function. E) are found at synaptic junctions of the sympathetic nervous system.
You may have noticed that after a large meal you have had some difficulty breathing. Which explanation is most accurate with regard to this situation?
A. The food presses on the bronchi, making air flow difficult. B. The large quantity of food retards pulmonary blood flow. C. Oxygen to the lungs is restricted due to fullness in the stomach. D. A full stomach impedes contraction of the diaphragm, limiting inhalation.