Limiting Factors in Biology

What happens when an environment reaches its carrying capacity?

• Populations will decrease

• Resources such as food, water, and space will be unlimited

• Populations will increase

• Nothing, everything will stay the same.

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True or False: A drought can reduce the size of a population.

• True

• False

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Factors that can limit the growth of a population.

• Community

• Limiting Factor

• Niche

• Biotic Potential

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What do limiting factors do?

• Separate biotic factors from abiotic factors.

• Determine which is the predator and which is the prey.

• Regulate how many organisms live in an ecosystem.

• Determine which natural disasters will hit an area.

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Which of the following are abiotic limiting factors?

• The decomposers in an ecosystem.

• Carrying capacities of several species.

• The populations of producers in a given habitat.

• Water, space, and oxygen.

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Which of the following is a biotic limiting factor?

• The amount of breathable oxygen available to a population.

• The nitrogen to oxygen ratio in the air supply.

• Food available for organisms.

• The number of bodies of water in a habitat.

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The size of the population of a species in an ecosystem is determined by the ________factors available to them.

• writing and drawing

• chemistry

• biotic and abiotic

• blanket and pillow

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Besides factors such as water, space, food, and oxygen, carrying capacity is affected by how many _______there are.

• cars

• houses

• schools

• organisms

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If a natural disaster devastates an ecosystem, what will this do to the carrying capacity of the population of a species within that ecosystem?

• 
  Increase it.

• 
  Will not affect it, so it will stay the same.

• 
  Decrease it.

• 
  Always reduce it down to zero.

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By which activity can humans change the carrying capacity of the population of a species?

• Studying the niches (the role an organism plays in a community) of particular species.

• Manipulating resources in its natural environment.

• 
  Compiling a list of habitats in an ecosystem.

• 
  Convincing it to reduce its carbon footprint.

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