Assuming geological evidence is accurate, life on Earth may have originated ____ billion years ago
a. 14
b. 4.6
c. 3.5
d. 2.1
e. 1.2
ANSWER: c
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Sulfur dioxide released by coal-burning power plants contributes to _____
a. ozone destruction b. sea level rise c. acid rain d. desertification
When the continent of Pangea first split apart, it formed
a. a northern landmass called laurasia and a souther landmass called gondwanaland b. thousands of small islands that later joined to form the modern continents c. a western landmass corresponding to north and south america and an eastern landmass corresponding to the other modern continents d. a western landmass corresponding to north and south americas and an eastern landmass corresponding to africa, australia, india and antarctica e. an array of landmasses similar to current ones in a single separation along multiple existing fractures
The most powerful way to infer evolutionary relationships relies on which type of evidence?
A) Comparison of DNA base sequences B) Comparative anatomy C) Behavioral similarities D) The ability to mate and produce fertile offspring
Which of the following would be a significant risk factor for the development of listeriosis?
A) Being a vegan B) Consumption of meat, poultry, eggs, and dairy products C) Receiving immunosuppressive drugs for treatment of an autoimmune disease D) Consuming home-canned foods