Bio 20 Practice Test
Use the following diagram to answer the next question
1. This diagram represents the idea that a. Both matter and energy form a cycle b. Neither matter nor energy form a cycle c. Matter cycles, but energy does not cycle d. Matter does not cycle, but energy does cycle
In 2004, approximately 86.5 % of all of the world’s power consumption was provided by fossil fuels, such as oil, natural gas, and coal. Fossil fuels provide energy through the combustion reactions that release carbon dioxide into the atmosphere.
2. The most likely impact that carbon in the atmosphere from fossil fuel combustion has on the biosphere is that
a. Earth’s albedo is increasing
b. Earth’s climate is growing warmer c. The ocean tides are becoming erratic
d. The hours of sunlight per day are decreasing
3. Which of the following substances is a product of photosynthesis? a. Water
Use the following information to answer the next two questions.
4. The idea that a toxin can increase in concentration as it passes through trophic levels is called
a. Predation
5. In this food chain, the peregrine falcon is a. The primary autotroph
b. A fourth-order consumer c. A second-order consumer d. At the fourth trophic level
Use the following information to answer the next question
The amount of energy entering into an ecosystem is equal to the amount of energy passing out of that ecosystem, although it changes forms as it moves through the ecosystem.
6. The given statement illustrates the a. Pyramid of energy
b. Law of conservation of mass c. First law of thermodynamics d. Second law of thermodynamics
Use the following information to answer the next question
A groups of people were shipwrecked on a tropical island. Without appropriate
equipment, catching fish was impossible for the stranded group. Fortunately, the group was able to salvage some chickens, goats and a variety of seed from the ship. Growing conditions on the island are good but the island was very small. In fact, it was far from certain that the area would be large enough to support everyone. Therefore, the group had to decide on the most energetically efficient way to maximize the yield of food.
7. According to the concepts contained in a pyramid of numbers, a means of maximizing food yield would be to
a. Eat a little bit of everything
b. Grow grain crops to feed the goats and chickens and then eat the meat c. Grow grain crops to feed the animals while living off eggs and goat’s milk d. Kill and eat the goats and chickens and then survive on the crops from the
Use the following information to answer the next question
8. In this ecosystem, the energy entering and the energy leaving are in the forms of a. Light and heat
Use the following information to answer the next question
Environmentally friendly soaps now available for home use are phosphate-free. Regular soap contains phosphates that are rinsed down drains, releasing phosphates into the environment.
9. Which of the following statements best explains why excess phosphates are harmful to the environment?
a. Phosphates destroy the ozone layer
b. Phosphates are poisonous to plants and animals
c. Phosphates react chemically to form phosphoric acid, a component of acid rain
d. Phosphates promote explosive growth of plants in bodies of water
10. Because a bog is acidic, most bacteria cannot survive in bog soil. Without bacteria in the soil, which of the biogeochemical cycles would be most affected?
a. Water cycles b. Carbon cycles c. Nitrogen cycles d. Phosphorous cycles
Use the following information to answer the next question
Many conservationists agree that producing electricity from a hydroelectric dam has less impact on global warming than producing electricity by burning coal.
11. Burning coal has a greater impact than the hydroelectric dam on a global warming because burning coal releases which of the following gases as waste?
a. O2 b. CO2 c. SO2 d. H2O
12. The carbon and nitrogen atoms found on Earth today
a. Were produced by consumers using the process of cellular respiration b. Are the same as those that were present on Earth three billion years ago c. Were produced by plants using the process of photosynthesis
Use the following information to answer the question
Cellular respiration and photosynthesis are the major chemical reactions in animals and plants, respectively. Animal cells rely only on cellular respiration for energy production. Plant cells, however, contain both mitochondria and chloroplasts. Therefore, they undergo both cellular respiration and photosynthesis.
13. Some hospital used to remove plants from patients’ rooms at night time. The theory behind this policy was that plants alter the atmosphere composition by
a. Contributing nitrogen to the atmosphere
b. Producing more oxygen than carbon dioxide at night c. Producing carbon dioxide and consuming oxygen at night d. Removing carbon dioxide from the surrounding atmosphere 14. The reason that water is a universal solvent is that
a. No substances dissolve in it b. Many substances dissolve in it c. Water covers a large portion of Earth
d. Water exists naturally in all three states of matter 15. Which trophic level has the greatest amount of biomass?
a. Producers b. Herbivores c. Top Predators
d. Secondary condsumers. Short Answer
16. Given that you have the following information, how would you create a diagram for pyramid of numbers? (2 marks)
Organism Number
Trees 10
Termites 50
Wood pecker 5
17. Explain how atmospheric composition changes can result in changes on the global scale. Provide two examples. (2 marks)
19. Why do we consider carbon, water, nitrogen, and phosphorus being in cycles in our environment? Provide all steps of one cycle. (4 marks)
20. What are the advantages and disadvantages of sinks in any of our biogeochemical cycles? Provide two of each. (2 marks)
