What is the primary function of the sinoatrial node?
A. To increase or decrease blood pressure
B. To supply the heart muscle with oxygen
C. To open and close the heart valves
D. To initiate the contraction of the heart
Answer: D
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The process whereby genetic exchange occurs by way of viruses carrying genes from one microbe to another is known as:
A. conjugation B. transduction C. transformation D. transubstantiation E. interchange
The end of mitosis is determined by the end of which phase?
a. prophase b. metaphase c. anaphase d. telophase e. cytokinesis
In contrast to the cell cycle of adult somatic cells, the dividing cells of an early embryo lack which cell cycle stage(s)?
A. S B. M C. interphase D. G1 and G2
Common methods of using moist heat to control microbial growth include all but which of the following?
A) Incineration B) Steam under pressure C) Non-pressurized steam D) Boiling water E) Pasteurization