What is required to restart a heart that has entered cardiac arrest?
a. A shot of epinephrine
b. None of these choices will restart a heart that has entered cardiac arrest.
c. CPR.
d. Elevation of the individual's legs.
e. An electrical shock to the heart.
e
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For living organisms, which of the following is an important consequence of the first law of thermodynamics?
A) The energy content of an organism is constant. B) The organism ultimately must obtain all of the necessary energy for life from its environment. C) The entropy of an organism decreases with time as the organism grows in complexity. D) Organisms grow by converting energy into organic matter. E) Life does not obey the first law of thermodynamics.
Which of the following processes introduce genetic diversity and contribute to the creation of daughter cells that are genetically unique from one another and from the parent cell?
A. recombination B. independent assortment C. meiotic cell division D. fusion of gametes E. All of these choices are correct.
On Earth, solar energy is most intense at
A. the South Pole. B. the North Pole. C. 60° North latitude. D. the equator. E. 60° South latitude.
In 2017, Holen and colleagues announced the discovery of a 130,000-year-old site in California that they claimed contained a mastodon that had been butchered by humans (genus Homo). Why did some in the scientific community express skepticism and caution in accepting the findings?
A. Humans are not thought to have mastered sophisticated tool use by 130,000 years ago. B. Mastodons are thought to have gone extinct long before that. C. The level of cooperative hunting needed to take down a mastodon did not appear until much more recently. D. It is widely believed that Homo sapiens are the only humans to have occupied North America and they did not arrive until 20,000 years ago. E. Homo neanderthalensis, the dominant hominin of the time, was vegetarian.