Which of these events occurred most recently in the history of Earth?
a. formation of oxygen
b. first humans
c. evolution of land plants, fungi, and land animals
d. origin of eukaryotes
e. origin of multicellularity
Ans: b. first humans
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Campylobacter jejuni subsp. jejuni grows best at what conditions?
a. 37°C under microaerobic conditions b. 37°C under anaerobic conditions c. 42°C under microaerobic conditions d. 42°C under anaerobic conditions
Which method of transport is illustrated here?
a. potocytosis
b. pinocytosis
c. receptor-mediated endocytosis
d. phagocytosis
In a group of 500 people, the frequency of genotype NN is 40%. Assuming both autosomal inheritance and that the population is in Hardy-Weinberg equilibrium, how many individuals would you expect to have the MN genotype?
A) 68 B) 232 C) 300 D) 200 E) 258
What is the difference between an intolerance and an allergy?
A) Intolerances produce symptoms that last several days, while patients having an allergic reaction recover in less than 24 hours. B) Intolerances can change over a patient's lifetime, but allergic reactions do not change throughout a patient's life. C) Intolerances tend to have a delayed onset of symptoms, while allergic reactions occur rapidly. D) Intolerances occur due to a patient's exposure to the environment, while allergic reactions are genetically determined. E) Intolerances have mild symptoms, while allergic reactions can be life threatening.