Cancer is characterized by _____________.
a) uncontrollable cell proliferation
b) formation of malignant tumors
c) the invasion of surrounding healthy tissues
d) all of the choices are correct
Ans: d) all of the choices are correct
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PCR typically results in the generation of fragments of all sizes
Indicate whether this statement is true or false.
In a phosphate group, a central phosphorus atom binds to which of the following?
a. four oxygen atoms b. five carbon atoms c. three oxygen atoms d. one hydrogen atom
As you climb a mountain, why do the biomes change?
A. The air is thinner. B. The latitude is changing. C. More rain falls in a rain shadow. D. Some animals live better at higher elevations. E. It is colder.
Which of the following pathogens/diseases would be the easiest to eradicate?
A. A pathogen that mostly infects animals but also sometimes causes disease in humans. B. A pathogen that only infects humans and rarely causes signs and symptoms. C. A disease that is asymptomatic and is carried by a large number of people in a population. D. A pathogen that only infects humans and causes obvious signs and symptoms. E. A pathogen that causes disease in both animals and humans.