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Which human activity will have the MOST positive effect on the global environment? A. reducing air pollution across countries by enforcing stricter emissions laws C. planting trees in neighborhoods where recent construction has taken place. B. decreasing the amount of trash in landfills through recycling of glass bottles. D. establishing a wildlife reserve for the protection of local endangered species.

A. reducing air pollution across countries by enforcing stricter emissions laws Back to Board

A summer camp was built near a lake in the mountains. The campers used the lake for swimming, fishing, and boating. The relationships between the three organisms found in the lake are shown above. Which of these fish cell structures would be most directly affected by a change in the oxygen level of the lake? A. nucleus B. Endoplasmic reticulum C. mitochondrion D. Golgi apparatus

C. mitochondrion Back to Board

A scientist proposes that there is a gene that both predisposes people to smoke and contributes to heart disease. She claims that the association between smoking and heart disease is explained by the presence of this gene, and she disputes the conclusion of the Framingham Study that smoking by itself increases the risk of heart disease. Which of the following types of scientific investigation would provide the best evidence against this scientist’s genetic explanation of the link between smoking and heart disease? A. Interviews with smokers indicating that cardiac symptoms are most acute when they have been smoking heavily B. Controlled experiments showing that lab rats exposed to cigarette smoke are more likely to develop heart disease C. Observational studies showing that heart disease risk increases only after an individual has begun smoking D. Gene-sequencing studies indicating that there is a gene related to heart disease that is carried by some nonsmokers

B. Controlled experiments showing that lab rats exposed to cigarette smoke are more likely to develop heart disease Back to Board

The diagram above shows the feeding relationships for four coral reef organisms. Humans sometimes kill giant tritons in order to collect their attractive spiral shells. If humans kill most of the giant tritons in a coral reef, the coral population most likely will A. decrease due to a decrease in the crown-of-thorns sea star population C. increase due to an increase in the parrot fish population B. decreases due to a decrease in the parrot fish population D. increase due to a decrease in the crown-of-thorns sea star population

A. decrease due to a decrease in the crown-of-thorns sea star population Back to Board

Earlobes may be free or attached, as shown in the illustration above. The type of earlobe a person has is genetically determined. The allele for free earlobe (E) is dominant, while the allele for attached earlobes (e) is recessive. A pedigree for the earlobe trait is shown above. Which of the following encodes the genetic information for the earlobe trait? A. ATP B. hormones C. carbohydrates D. DNA

D. DNA Back to Board

A pictorial chart of five cichlid species of fish is shown above. The physical differences among the fish are most likely A. A swimming adaptation due to water temperature C. a feeding adaptation due to competition for food B. An osmotic adaptation due to salinity levels D. A respiration adaptation due to different oxygen levels

C. a feeding adaptation due to competition for food Back to Board

Which statement BEST describes the primary function of DNA replication? A. To prevent mutations from occuring in cells C. To allow prokaryotic cells to undergo meiosis B. to ensure daughter cells have a complete copy of the DNA. D. To provide genetic variation within specific organisms

B. to ensure daughter cells have a complete copy of the DNA Back to Board

Which cellular process converts solar energy into chemical energy? A. respiration B. transpiration C. photosynthesis D. chemosynthesis

C. photosynthesis Back to Board

The graph above shows the production of antibodies following a flu shot. Which of the following statements best describes the maximum antibody level of a person’s body after a flu shot? A. It occurs immediately B. it is never achieved C. It is achieved on day 15 D. It is achieved on day 18

D. It is achieved on day 18 Back to Board

The diagram shows a relationship between photosynthesis and cellular respiration. Which statement best describes the interdependence of photosynthesis and cellular respiration? A. The products of photosynthesis are carbon dioxide and water to be used in cellular respiration B. The reactants of photosynthesis are the products of cellular respiration. C. The reactants of photosynthesis are sugar and oxygen to be used in cellular respiration. D. The products of photosynthesis are the same as the products of cellular respiration

B. The reactants of photosynthesis are the products of cellular respiration. Back to Board

The chemical equation above shows the reaction of glucose and oxygen. Which process does this equation represent? A. Aerobic respiration C. Anaerobic respiration B. photosynthesis D. Nitrogen fixation

A. Aerobic respiration Back to Board

The three factors that contribute to arterial blood pressure are cardiac output, blood volume and _____. A. viscosity C. valves B. resistance D. Heart rate

B. resistance Back to Board

This data of a forest plot supports the idea A. red oaks grow more quickly than hemlocks B. hemlock trees regenerate quickly after a fire C. pitch pines are resistant to fire D. birch trees have the most stored energy

C. pitch pines are resistant to fire Back to Board

The scientific theory of evolution by natural selection is well supported through much evidence, would this theory ever become a law? A. Theories cannot become laws because theories are explanations of a series of observations B. This theory will eventually become a law after many repeated observations yield the same result. C. This theory will become law because theories and laws are essentially the same thing D. Theories don't become laws because laws are well-supported explanations/descriptions of a situation, and a theory explains a series of observations.

D. Theories don't become laws because laws are well-supported explanations/descriptions of a situation, and a theory explains a series of observations. Back to Board

A disease resulting in the deaths of one-third of a dense population of bats in a cave would be a A. density-dependent limiting factor C. Result of the demographic transition B. density-independent limiting factor D. Result of social and economic factors

A. density-dependent limiting factor

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