Which of the following terms is used to label the rhythmic changes in sympathetic and parasympathetic activity that affect heart rate coincident with respiration?
A) pulmonary sinus arrhythmia
B) respiratory sinus rhythmia
C) respiratory sinus arrhythmia
D) lung sinus rhythmia
E) pulmonary sinus rhythmia
Answer: C) respiratory sinus arrhythmia
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Gel electrophoresis separates DNA fragments according to their ________.
A. charge B. length C. base sequences D. polarity
The word eukaryotic refers specifically to a cell containing
a. photosynthetic membranes. b. a true nucleus. c. a cell wall. d. none of the above.
The removal of the root cap eliminates the ability of a root to respond to gravity.
Answer the following statement true (T) or false (F)
If a mutagen such as EMS is used to produce numerous mutagenized cell lines for an organism, PCR can be used to select for a particular gene. However, what feature of this selected sequence is used to find the ones with mutations in that gene?
What will be an ideal response?