T1/2 Final Exam Review

What is carrying capacity?

• The maximum number of people that can fit in a school bus

• The maximum number of a species that can sustainably live in a given area

• The maximum number of resources available to a population

• The maximum number of teachers in a school

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Does carrying capacity apply to human population?

• Yes, and it is currently at its maximum level

• No, carrying capacity only applies to animal populations

• Yes, but it is unknown what the carrying capacity is

• No, human population can continue to grow indefinitely

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NGSS.MS-ESS3-4

Which of the following explains limiting factor?

• A group of organisms that can interbreed to generate fertile offspring.

• A biotic or abiotic things that restricts the growth of a population.

• Living or produced by living things.

• The source or supply that can be used to benefit an organism or population.

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The graph provided shows the population of an organism introduced to a new environment and how the population changed over sixty days. After the sharp rise, there was a leveling off of the population. What does this indicate?

• The life expectancy of the organisms in this population is about thirty days.
• This species is unable to reproduce, in any habitat, beyond a population of around 300 individuals.

• This organism needs thirty days to reach maturity before it can reproduce.
• This environment has only enough resources to support 250–300 individuals of this organism.

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It was originally estimated by scientists that the carrying capacity of humans on earth was approximately 1 billion people. The population of earth is now over 8 billion people. What is the best explanation for this.

• Humans have greatly exceeded their carrying capacity.

• Humans have become more efficient in producing and replenishing food resources.

• Humans now consume less resources than they did previously.

• The earth has continued to grow at the same rate as the human population has.

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It is possible that a particular species will exceed its carrying capacity in the short-term. Which of the following will be the end result for the species.

• The population will crash and experience a sudden decrease or extinction

• The population will level out and no longer grow
• Population growth will continue to increase but at a lesser rate

• Other species will increase as well in order to balance the ecosystem

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The populations of four species introduced into a new ecosystem are plotted for the first one hundred days in the graph provided. Which species was first to reach the carrying capacity of the ecosystem for that particular kind of organism?

• diamond

• square

• circle

• triangle

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Which of the following could have caused the change in population level between 2010-2015?

• increase in predation
• introduction of a disease
• habitat destruction

• increase in food abundance

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Which of the following would have the lowest ecosystem resilience?

• tropical rainforest/jungle

• a small pond

• the Pacific Ocean
• the African Savanna

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Why are predators important to the ecosystem?

• The predators and prey populations interbreed and help increase population levels

• Predators compete with prey for vegetation
• Predators keep the prey population lower, so they don't eat all the vegetation

• Predators are a limiting factor that increase the carrying capacity of ecosystem

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