Biotic Factors of Ecosystem

Brandon and his dad cut a tree that fell in a storm into smaller sections. Then they split the wood to use for firewood. Firewood is an example of which type of factor from the ecosystem?

An arctic blast pushed its way through several of the Northern state in the United State. The temperatures dropped below freezing for several days. Temperature is an example of which type of factor?

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Jackrabbits and cacti are biotic factors in a desert ecosystem that rely on which abiotic factors?

• insects and sun

• snakes and temperature

• water and insects

• water and soil

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Which of the following shows an abiotic factor interacting with a biotic factor in the environment?

• Lamprey eels survive by attaching themselves to fish.

• Water temperature affects its oxygen level.

• Low light intensity affects the growth of forest pine trees.

• Gypsy moth caterpillars eat the leaves of apple trees.

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Which of the following is an abiotic factor that could affect biotic factors?

• Population of rabbits.

• Presence of harmful bacteria.

• Length of daylight.

• Number of herbivores.

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If a disease destroying barley plants in a field swept through an ecosystem, what would happen to the barley eating bird population in the field ?

• The bird population would stay the same

• The bird population would decrease

• The bird population would infinitely increase

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Plants need moisture, carbon dioxide, oxygen, light, and minerals to survive. This scenario shows that these living organisms depend on .

• Biotic and abiotic factors

• Biotic Factors

• Abiotic factors

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The lavender plant serves an important role in the life cycle of the monarch butterfly. Adult monarchs lay their eggs in the lavender plant, and then the monarch caterpillars eat that same plant during their development.

Based on the relationship between monarchs and lavender, what is one reasonable prediction a scientist could make?

• If the lavender population goes down, the monarch population will go down.

• Population of monarch butterflies should remain constant when lavender population decreases.

• A decrease in the lavender population would cause a monarch butterfly population increase.

• If the population of lavender remains constant (the same), the monarch butterfly population increases.

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Hawks and owls feed on the same organisms. That relationship is called ___________.

• Symbiosis

• Competition

• Predation

• Parasitism

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A crab is protected from fish when an anemone rides on its shell. In turn, the anemone feeds from the crab's food scraps.

• Commensalism

• Predation

• Competition

• Mutualism