Which of the following best describes the culture of science and how scientists work?
A. Scientists commonly repeat other scientists' experiments to verify their work.
B. Scientists attempt to prove their hypotheses.
C. Scientists commonly make subjective conclusions in their work.
D. Scientists develop hypotheses based solely on their own observations.
A. Scientists commonly repeat other scientists' experiments to verify their work.
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When examining the hierarchy of life, which of the following terms is most inclusive?
a. population b. species c. biosphere d. ecosystem e. population
About 12,000 years ago, a mass extinction event occurred and 75% of the world's large mammal species were eliminated. While a small number of cheetahs managed to survive and restore the world's population of cheetahs, this event caused an extreme reduction of the cheetah's genetic diversity. Based on the principles of natural selection, which of the following is a consequence of their reduced genetic diversity?
A. Cheetahs are unable to effectively compete with each other for resources. B. Cheetahs have very little heritable variation, which will make it difficult for them to adapt as the environment changes. C. Cheetahs have never fully adapted to the current environment. D. Cheetahs within the same population do not vary in their reproductive success.
Upwelling
a. increases productivity by bringing nutrient-rich cool water to the surface of the ocean. b. occurs in cold northern oceans. c. refers to the accumulation of pollution in the North Pacific Ocean. d. occurs when warm ocean currents approach the edge of continents. e. generates the major climatic changes in the Pacific Ocean known as El Niño.
Which of the following statements cannot be tested by science?
A) Male lions sleep 20 hours a day. B) Male lions have brown manes. C) It is wrong that male lions kill baby lions when taking over a new pride. D) All statements can be tested by science.