Meiosis produces a ________, which eventually gives rise to an egg in an unfertilized seed
A) pollen tube B) microspore C) sepal D) megaspore E) sporophyte
D
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Cholera is a bacterial disease, in which fatal dehydration can occur due to loss of water into the intestines. Cystic fibrosis is a human genetic disease characterized by excess mucus buildup on the linings of the lungs, making breathing difficult. Cholera acts on intestine cells to force water transport out of the cells and the body. Cystic fibrosis has an abnormal CFTR transport protein that limits water transport out of the cells and the body. How does the bacteria that causes cholera, Vibrio cholera, trigger potentially life-threatening diarrhea?
A. Cholera toxin stimulates CFTR, leading to decreased transport of water into the intestines. B. Cholera toxin causes a DNA genetic mutation that modifies the function of CFTR proteins. C. Cholera toxin inhibits CFTR, leading to decreased transport of water into the intestines. D. Cholera toxin inhibits CFTR, leading to increased transport of water into the intestines. E. Cholera toxin stimulates CFTR, leading to increased transport of water into the intestines.
One theory for the formation of proteins on the primitive earth suggests that they formed on
a. sedimentary rock. b. igneous rock. c. mud. d. bodies of water. e. clay.
If you have a sufficiently large random sample from the population, but do not know how treatment was assigned, what object will a confidence interval centered on the difference in average outcomes for the treated and control groups be describing?
A. ATE B. ETT + Selection Bias C. ETT D. Selection Bias
Match the following
0.03mm A) 300um B) 3000um C) 30um