Upon release from rehabilitation, fire fighters should _____.
a. be medically evaluated
b. report for reassignment
c. be released from the scene
d. return to their previous assignment
Answer: b. report for reassignment
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Each cell is able to maintain an internal state of chemical and physical stability. This is called
a. metabolism. b. homeostasis. c. physiology. d. adaptation. e. evolution.
Which form of communication is used by social insects to modify the behavior of the colony?
A. auditory communication B. chemical communication C. visual communication D. None of the choices are used by social insects. E. All of the choices are used by social insects.
Claytonia virginica is a woodland spring herb with flowers that vary from white to pale pink to bright pink. Slugs prefer to eat pink-flowering over white-flowering plants (due to chemical differences between the two), and plants experiencing severe
herbivory are more likely to die. The bees that pollinate this plant also prefer pink to white flowers, so that Claytonia with pink flowers have greater relative fruit set than Claytonia with white flowers. A researcher observes that the percentage of different flower colors remains stable in the study population from year to year. Given no other information, if the researcher removes all slugs from the study population, what do you expect to happen to the distribution of flower colors in the population over time? A) The percentage of pink flowers should increase over time. B) The percentage of white flowers should increase over time. C) The distribution of flower colors should not change. D) The distribution of flower colors should randomly fluctuate over time.
Which of the following explains why the human population has so many phenotypic differences?
A. The majority of our genome consists of noncoding DNA. B. The majority of our genome consists of DNA that codes for proteins. C. Recombination allows for new genetic combinations. D. The genes that code for what we look like are more susceptible to mutation than other genes. E. None of the answer options is correct.