Which of these carry(ies) oxygen-poor blood?
A) pulmonary arteries
B) pulmonary veins
C) aorta
D) left ventricle
A
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Scientists attempted for many years to conduct nuclear transplants but failed. However, geneticists had success in cloning a sheep. They were successful because they
A. utilized a new micro pipette technique. B. replicated the blastomeres before insertion. C. treated the nucleus with sheep plasma before nuclear insertion. D. delayed transcription in the blastomeres. E. picked a cell very early in development.
Gram staining of bacteria provides all the physical characterization necessary to identify bacterial species
Indicate whether the statement is true or false
What two hormones are involved in regulating the blood calcium level?
A. PTH and calcitonin B. renin and PTH C. calcitonin and renin D. aldosterone and PTH E. renin and aldosterone
Which of the following diseases is NOT caused by an airborne virus?
a. chicken pox b. measles c. mumps d. scarlet fever