The Earth’s shifts the angle of its axis
approximately every ___ years.
a. 4,000
b. 40,000
c. 400,000
d. 4,000,000
e. 4,000,000,000
B
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The pancreas produces a variety of digestive secretions, including (select all correct choices):
A. lipase for fat digestion. B. trypsin for further protein digestion. C. bicarbonate ions to neutralize stomach acid. D. methane from fermentation. E. gastrin to stimulate HCl production.
The driving force for heart contraction is
a. contraction of the atria. b. contraction of the ventricles. c. closing of the AV valves. d. opening of the AV valves. e. closing of the aortic valve
Iris is a long-day plant that normally flowers in the spring. Which regimen would be the most effective in making an iris bloom in late fall?
A) interrupting the plant's nights at 2:00 am with a flash of far-red light B) interrupting the plant's nights at 2:00 am with a flash of red light followed by a flash of far-red light C) interrupting the plant's nights at 2:00 am with a red flash, then a far-red flash, then a red flash D) interrupting the plant's days at 2:00 pm by putting it in the dark
True or False: The light scattering in flow cytometry provides a way to quantify cells based on their size
a. TRUE b. FALSE