January 2018 Living Environment Regents Questions 11-20 Question Preview (ID: 56828)

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Which statement best describes a result of this process?

a) The spider from which the DNA sample was obtained can no longer produce spider silk.

b) The goat milk now contains DNA molecules made of spider silk proteins.

c) Both the spider and the goat can now produce both spider silk and goat milk.

d) Spider silk proteins can now be produced in large quantities without killing spiders to obtain them.

Which change is an example of a response to a stimulus?

a) The pupil of an eye decreases in size in bright light.

b) A leaf absorbs sunlight in the morning.

c) The water level of a pond rises on a rainy day.

d) A dead tree decays after many years.

Which statement best explains these observations?

a) Chemical elements, including nitrogen, pass through food webs and are combined and recombined in different ways.

b) Chemical elements, including nitrogen, are removed from food webs and eliminated from ecosystems.

c) Nitrogen is transferred directly from bacteria to humans.

d) All elements in the ocean remain there and are not transferred to other ecosystems.

Which statement describes an event that would most severely disrupt the process of ecological succession in an area?

a) The season changes from spring into summer.

b) Native plants are planted in an abandoned field.

c) Plants and animals begin to colonize a newly formed volcanic island.

d) A dam is built on a river to form a reservoir.

The processes of diffusion and active transport are both used to

a) break down molecules to release energy

b) move molecules into or out of cells of the body

c) bring molecules into cells when they are more concentrated outside of the cell

d) move molecules against a concentration gradient, using ATP molecules

The toxin most likely interferes with the normal functioning of a

a) chromosome

b) DNA molecule

c) receptor

d) digestive hormone

Based on this information, which ecosystem is likely to be the most stable?

a) A

b) B

c) C

d) D

The organisms represented by X are

a) decomposers

b) producers

c) carnivores

d) scavengers

When rain forests are cut down, there is a

a) loss of fossil fuels that could be used by industry

b) release of excess oxygen to the atmosphere

c) release of chemicals which cause helpful mutations

d) loss of genetic material available for research

Which statement would best dispute the claim that these rock formations are living?

a) Rocks are not composed of cells, while living organisms are.

b) Rocks perform complex metabolic processes, but cannot grow.

c) Rocks cannot reproduce sexually.

d) Rocks remain stable in a wide range of physical conditions.

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