Unit 1 Characteristics of Life and Ecology

What type of symbiosis? Hummingbirds feed on nectar from flowers. The flowers are pollinated by hummingbirds as they move from flower to flower.

• commensalism

• mutualism

• parasitism

• predation

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Aphids are tiny insects that live on and eat the leaves of plants, removing vital nutrients from the plants.

• Predation

• Parasitism

• Commensalism

• Mutualism

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Which would most likely result in primary succession?

• old forest growing

• undisturbed prairie

• pollution kills mountain lake species

• a Newly formed volcanic island

Which would result in primary succession?

• Flood destroying a habitat

• Tornado destroying a crop leaving very little soil

• Glacier retreating exposing bare rock

• limiting factors

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A remora attaches to a shark and has the benefit of scrap food from the shark. This relationship does not affect the shark.

• mutualism

• parasitism

• commensalism

• competition

Which of the following shows secondary ecological succession?

• forest fire killing off smaller plants, then allows growth for others

• rapid evolution of animal species

• development of an ecosystem with only mature trees

• a meteor impact that kills all ecosystems

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Which provides the most energy?

• carnivores

• producers

• omnivores

• herbivores

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What is another term of herbivore?

• producer

• consumer

• omnivore

• decomposer

Humans are omnivores, because they eat both plants and meat. Which level of the energy pyramid lacks that characteristic necessary to sustain humans?

• bottom level

• second level

• third level

• top level

If the population of a certain predator increases, there is often _______ its prey

• a decrease the population of
• an increase of the population of 
• great news for its prey of
• no  impact found on

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