What is the primary function of the sinoatrial node?
A) Initiates the contraction of the heart
B) Increases or decreases blood pressure
C) Opens and closes the heart valves
D) Supplies the heart muscle with oxygen
A
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When MAR is combined with FISH, one can analyze the phylogenetic identity and the specific substrate uptake patterns of microbes of interest at the level of a single cell in complex microbial communities.
Answer the following statement true (T) or false (F)
A myogram is a recording of
A) the electrical activity of muscle cells. B) the electrical activity of nerves at neuromuscular junctions. C) the activity of muscle cells. D) blood pressure changes resulting from muscle contraction. E) the movement of myosin filaments.
When an endospore enters the body it will remain dormant.
A) True B) False
Which of the following statements is true?
A) Sister chromatid exchange would lead to a reshuffling of alleles. B) Exchanges occur between homologous chromosomes, but never between sister chromatids. C) Crossing over has a cytological basis. D) Sister chromatid exchange would mutate one strand of DNA. E) Harlequin chromosomes are a result of homologous recombination.