SSA Review Day 2

Individuals within a population have slightly different traits. How do these differences improve the likelihood that the population will survive?

• Variation allows the population to produce offspring that will survive into adulthood.

• Variation allows the population to create new genes to survive a significant change in the environment.

• Variation allows the population to survive changes in the environment because traits that are suited to the new environment already exist in the population.

• Variation allows individuals who are very different from the rest of the population to reproduce more successfully than “normal” individuals.

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Which of the following species of organisms is most likely to become extinct?

• a species that is well adapted to its environment

• a species that is not adapted to its environment

• a species that has few offspring within a life cycle

• a species that has many offspring within a life cycle

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What happens to a population when a resource that is a limiting factor in the environment suddenly becomes scarce?

• The population size will increase until that limiting factor becomes abundant again.

• The population size will decrease to a size that can be supported by that limiting factor.

• The population size will remain the same and make use of other, more abundant limiting factors.

• The population size will fluctuate as individuals adapt to the reduced availability of the limiting factor

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Earth’s environments include both biotic and abiotic factors that living things need to survive. Large mangrove ecosystems are found along the coastlines in Florida. The figure shows a mangrove ecosystem that has both biotic and abiotic factors.  Which of the following are both abiotic factors in the mangrove ecosystem?

• Water and pelican

• Sun and rocks

• Pelican and crab

• Snail and water

All organisms need instructions to specify their traits. The instructions, or code, that is responsible for all the inherited traits of an organism

• is passed from the offspring to the parent.

• is stored within the mitochondria of cells.

• is formed after an organism is fully grown.

• is held in genetic material called DNA.

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Gemma wants to investigate the rain forest ecosystem of the Amazon jungle in South America. To conduct the experiment, Gemma uses plants, reptiles, and insects native to New Jersey, where she lives, to build a terrarium such as the one shown in the following figure. Which limitation is true of Gemma’s experiment?

• It does not model the interaction of certain insects and plants.

• It does not model the interaction of certain reptiles and plants.

• It does not model the interaction of certain reptiles and insects.

• It does not model the exact conditions of nature in the Amazon.

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Which of the following human activities could have an irreversible effect on an ecosystem?

I. introducing a new species

II. urban sprawl

III. introducing a new chemical

IV. over-hunting

• II and IV only

• I and III only

• II, III, and IV only

• I, II, III, and IV

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