Biology Air Test

A student was studying how a change in abiotic factors can influence living organisms. She set up the experiment as follow:

1) Fill two glass fish tanks, labeled Tank A and Tank B, with 5 liters of water each.
2) Add a small fish and several plants to each tank.
3) Seal both tanks so that no air can leave or enter.
4) Place Tank A in a bright room and Tank B in a dark room.

The student noticed after 45 hours, the fish in Tank B died while the fish in Tank A remained healthy. Based on the results of the experiment described above, what is the best explanation for why the fish in Tank A lived and the fish in Tank B died?

• Fish died in Tank B due to a lack of carbon dioxide.

• Fish died in Tank B because the tank was sealed.

• Fish died in Tank B due to lack of oxygen.

• Fish died in Tank B because the temperature was too low.

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The lead biologist at a Central Florida wildlife management area has noticed that there had been a significant increase in the population of native bats after a local school had added several bat houses to the management area as part of a community service project. What does this observation most likely indicate about the bat's relationship to the newly installed bat houses?

• Shelter was a limiting factor for the bat population.

• Shelter was a biotic factor needed by the population of bats.

• Shelter will became a surplus resources after several generations.

• Shelter will act as a selective pressure to evolve a new species of bats.

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On remote islands, immigration and emigration usually do not have a large effect on population sizes. A bird population on a remote island remains at a relatively constant size year after year. Which of the following most likely describes the birthrate and the death rate for this population?

• Birth rate and death rate are both zero.

• Birth rate and death rate are close to equal.

• Birth rate is significantly less than death rate.

• Birth rate is significantly greater than death rate.

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How does the predator-prey relationship affect a population?

• The predators and prey are in competition with each other.

• Usually either the predator or the prey will become extinct.

• The predator species usually has exponential growth.

• The relationship controls the population size of both species.

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The number of pythons found throughout the Everglades has increased in recent years. These huge snakes are invasive to Florida and are believed to have been released into the wild by pet owners. Wildlife biologists have attempted to capture and remove these pythons. Which statement best explains the biologists' reasons for removing these pythons from the Everglades?

• The pythons could attract other non-native species to the area.

• The pythons could adapt to overcome diseases common to native snakes.

• The pythons could prey on native organisms and cause native populations to decline.

• The pythons could begin to interbreed with native snakes and produce a more successful species.

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The term “biodiversity” refers to

• The number of species living on Earth.

• The number and variety of species living on Earth.

• The number and variety of species that are considered renewable.

• The number and variety of species that live in an area.

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Which of the following processes is primarily responsible for the exchange of gases in the lungs?

• Osmosis

• Diffusion

• Active transport

• Filtration

What is the main function of the alveoli in the respiratory system?

• To filter out dust particles

• To exchange oxygen and carbon dioxide

• To humidify the air

• To produce mucus

Which part of the human brain regulates the rate of breathing?

• Cerebrum

• Cerebellum

• Medulla oblongata

• Hypothalamus

What is the primary component of the air we breathe?

• Oxygen

• Carbon dioxide

• Nitrogen

• Argon