Flow of energy in Ecosystems and Ecosystem Relationships

Which of the following are abiotic factors in an ecosystem?

• plants and sunlight

• a rotting log and soil

• soil and temperature

• . water and fungi

Which best explains the role of bacteria in an ecosystem?

• They convert carbon dioxide and water into simple carbohydrates

• They break down organic matter into necessary nutrient components

• They convert carbon dioxide and water into simple carbohydrates

• They absorb energy from the synthesis of inorganic compounds.

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Which of the following limiting factors will most likely prevent further population growth within an ecosystem

• excess water supply

• . Transportation availability

• . Food supply to the area

• Recycling of human goods

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Which best describes the effect on an ecosystem when populations of white-tailed deer are overhunted by people in the area?

• . It decreases the amount of producers

• It directly increases the population of decomposers

• It disrupts the balance between predators and prey

• . It decreases competition for food among carnivores

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.A bird lands on the back of a giraffe and eats ticks. What relationships exists among these organisms?

• The bird and giraffe have a parasitic relationship, while the tick and giraffe have a parasitic relationship.

• Only mutualistic exists between the organisms

• The bird and giraffe have a mutualistic relationship, while the giraffe and tick have a parasitic relationship

• Only parasitic relationships exists among the giraffe, tick and bird

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Which provides most of the carbon dioxide that algae need to make food?

• animals

• producers

• decomposers

• bacteria

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Besides water and food, what two other limiting factors impact organisms in an ecosystem?

• Wind speed and temperature

• Shelter and space

• Soil and air quality

• Number of heterotrophs and respiration

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How are the remains of living organisms cycled through ecosystems?

• Decomposition

• Carbon Cycle

• Photosynthesis

• Cellular Respiration

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What would be the result of deforestation on an ecosystem?

• increase in biomass

• . increase in food supply to the area

• loss of habitat

• . increase in genetic diversity

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If the primary food source for the whale population in an area is depleted, which will most likely happen?

• The whale population will stabilize

• The whale population will increase

• Competition among the whales will increase

• Starvation will cause the whales to become extinct

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