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BIO 160 -Ch.1 quiz with verified
solutions already graded A+
Which of the following statements about the properties of life is false? A) All organisms have the ability to maintain a constant internal temperature. B) All organisms have the ability to reproduce. C) All organisms have the ability to respond to stimuli from the environment. D) All organisms have the ability to take in energy and use it. - answer A) All organisms have the ability to maintain a constant internal temperature. Life is organized in a hierarchical fashion. Which of the following sequences correctly lists that hierarchy from least inclusive to most inclusive? A) cell, molecule, organ system, organ, organelle, population, tissue, organism, ecosystem, community B) organism, organ system, tissue, population, organ, organelle, community, cell, ecosystem, molecule C) molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem D) ecosystem, population, organ system, cell, community, molecule, organ, organism, organelle, tissue - answer C) molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem The tree in your backyard is home to two cardinals, a colony of ants, a wasp's nest, two squirrels, and millions of bacteria. Together, all of these organisms represent
A) a community. B) a species. C) an ecosystem. D) a population. - answer A) a community. If you eat a hamburger, you are mainly eating ground-up beef muscle. What levels of organization are represented in this ground-up muscle? A) tissue, organ, and organ system B) organ, organ system, and organism C) organelle, cell, and tissue D) organism, population, and community - answer C) organelle, cell, and tissue Which level in the hierarchy shown is a community? A) level A (Environmental on earth supporting life) B) level B (Savannah) C) level C (All organisms in the Savannah) D) level D (Group of Savannah - answer C) level C (All organisms in the Savannah)
A) make their own food through photosynthesis. B) can obtain their food by eating other organisms. C) can obtain their food either by absorption or by photosynthesis. D) are composed of cells that lack a cell membrane. - answer B) can obtain their food by eating other organisms. Kingdom Fungi includes species A) that obtain food by ingestion. B) that obtain food by decomposing dead organisms and absorbing the nutrients. C) such as mushrooms and plants. D) that use photosynthesis to obtain food. - answer B) that obtain food by decomposing dead organisms and absorbing the nutrients. Which of the following is a kingdom within the domain Eukarya? A) Viruses B) Bacteria C) Archaea D) Fungi - answer D) Fungi All organisms belonging to the kingdom Plantae A) are photosynthetic. B)are unicellular and lack a nucleus.
C) obtain food by decomposing the remains of dead organisms and absorbing the nutrients. D) are multicellular and lack a nucleus. - answer A) are photosynthetic. B)are unicellular and lack a nucleus. The teeth of grain-eating animals (such as horses) are usually broad and ridged. This makes the teeth suitable for grinding and chewing. Meat-eating animals (such as lions) have pointed teeth that are good for puncturing and ripping flesh. This illustrates A) the connection between form and function only. B) a result of natural selection only. C) a result of natural selection as well as the connection between form and function. D) a food web. - answer C) a result of natural selection as well as the connection between form and function. Which of the following statements is not consistent with Darwin's theory of natural selection? A) Individual organisms exhibit genetic change during their life spans to better fit their environment. B) Individuals in a population exhibit variations, some of which are passed from parents to offspring. C) Natural selection can lead to the appearance of new species. D) Factors in the environment result in some organisms having better reproductive success than others. - answer A) Individual organisms exhibit genetic change during their life spans to better fit their environment
To be scientifically valid, a hypothesis must be A) controlled. B) part of a theory. C) reasonable. D) testable and falsifiable. - answer D) testable and falsifiable. The role of a control in an experiment is to A) ensure repeatability. B) counteract the negative effect of the experiment. C) provide a basis of comparison to the experimental group. D) prove that a hypothesis is correct. - answer C) provide a basis of comparison to the experimental group. A scientist performs a controlled experiment. This means that A) two experiments are conducted, one differing from the other by only a single variable. B) one experiment is performed, but the scientist controls the variables. C) the experiment is repeated many times to ensure that the results are accurate. D) the experiment proceeds at a slow pace to guarantee that the scientist can carefully observe all reactions and process all experimental data. - answer A) two experiments are conducted, one differing from the other by only a single variable.
After reading the paragraph, answer the question(s) that follow. The National Institutes of Health (NIH) set up a study to determine whether large doses of vitamin C would shorten the length of time it takes to recover from a cold. Three thousand volunteers were split into two groups. For two weeks, members of Group A took 3,000 mg of vitamin C daily. Group B received 3,000 mg of a placebo. At the end of the two-week period, the researchers inserted live cold viruses directly into the noses of all the volunteers. The volunteers in both Group A and B continued to take their daily pills. All the volunteers got colds, and there was no significant difference in the length of time the colds lasted. Which was the experimental group? A) Group A only B) Group B only C) all 3,000 volunteers D) the researchers that inserted the cold virus - answer A) Group A only After reading the paragraph, answer the question(s) that follow. The National Institutes of Health (NIH) set up a study to determine whether large doses of vitamin C would shorten the length of time it takes to recover from a cold. Three thousand volunteers were split into two groups. For two weeks, members of Group A took 3,000 mg of vitamin C daily. Group B received 3,000 mg of a placebo. At the end of the two-week period, the researchers inserted live cold viruses directly into the noses of all the volunteers. The volunteers in both Group A and B continued to take their
C) Many strains of bacteria are now resistant to some commonly used antibiotics. D) Some insect species are now resistant to pesticides. - answer A) Because of hunting, species such as bears and wolves are in danger of extinction.
