Neurons known as "pacemaker" cells:
A) are the output cells for oscillator circuits
B) have inherent spontaneous rhythms
C) control heart heart
D) None of the above
Answer: C) control heart heart
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Adaptive zones opened up for the dinosaurs after
a. early dinosaurs evolved a four-chambered heart. b. large fragments from an asteroid or comet hit multiple locations on Earth. c. volcanic eruptions and global climate change during the Cretaceous. d. reptiles became very large in size. e. all of these occurred.
What are the five premating isolating mechanisms that keep different species from successfully mating?
What will be an ideal response?
One of the risks of low crop diversity is that there is a greater risk of famine should the crop exposed to disease. An example is the failure of the ___ crop in Ireland for several years in the mid-1800's.
a) corn b) potato c) rice d) wheat
As more voltage is applied to an electrophoresis gel, the temperature (increases/decreases/stays the same).
What will be an ideal response?