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Practice questions for the Biology/ Living Environment Regents. Attribute: nysedregents.org

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Living Environment Regents Practice Questions

Question 1 of 10

1

The fossil record of ancient life forms provides scientific evidence of

Select one of the following:

  • direct harvesting

  • selective breeding

  • gene manipulation

  • evolutionary changes

Explanation

Question 2 of 10

1

Which situation results in a characteristic that is inheritable?

Select one of the following:

  • A limb is lost when two marine organisms fight.

  • A puppy learns to beg for food by watching an older dog perform tricks.

  • A gene is inserted into a bacterium, allowing the organism to produce insulin.

  • A random mutation causes the immediate death of a microbe.

Explanation

Question 3 of 10

1

Which statement explains the importance of maintaining a constant internal environment to ensure proper enzyme functioning?

Select one of the following:

  • Changes in pH and temperature will cause the enzyme reaction rate to be too fast.

  • Temperature and pH determine amino acid sequences in enzymes.

  • Changes in pH will change the genetic instructions of enzymes.

  • Increasing the temperature and pH can alter the specific shape of enzymes.

Explanation

Question 4 of 10

1

The major function of the placenta is to

Select one of the following:

  • cushion the fetus so it won’t be hurt when the mother moves.

  • exchange food, oxygen, and waste between mother and fetus.

  • store food for the fetus.

  • support the egg for the process of fertilization.

Explanation

Question 5 of 10

1

Which statement best describes an ecosystem maintaining a state of approximate equilibrium?

Select one of the following:

  • Nutrients from decayed organisms are recycled in a forest ecosystem.

  • All the frog species in a South American rain forest become extinct.

  • A mutation spreads through a species of bacterium, making them unable to decompose wastes.

  • Mice are released into a field ecosystem as food for a declining predator population.

Explanation

Question 6 of 10

1

Which characteristic of a geographic region would have the greatest influence on the type of ecosystem that forms in that region?

Select one of the following:

  • ratio of autotrophs to heterotrophs

  • concentration of atmospheric oxygen

  • number of food chains

  • climatic conditions

Explanation

Question 7 of 10

1

Growing exotic (nonnative) plant species in parks and gardens could lead directly to an increase in the

Select one of the following:

  • biodiversity of the autotrophs that feed on them.

  • populations of native carnivores.

  • competition between them and native producers.

  • breeding between them and native herbivores.

Explanation

Question 8 of 10

1

Growing exotic (nonnative) plant species in parks and gardens could lead directly to an increase in the

Select one of the following:

  • biodiversity of the autotrophs that feed on them.

  • populations of native carnivores.

  • competition between them and native producers.

  • breeding between them and native herbivores.

Explanation

Question 9 of 10

1

On hot, dry days, guard cells often close microscopic openings in plant leaves, conserving water. This is an example of

Select one of the following:

  • environmental factors causing gene mutation in plants

  • finite resources acting as selecting agents for evolution

  • a feedback mechanism for maintaining homeostasis

  • differentiation in plants as a result of stimuli

Explanation

Question 10 of 10

1

In the human body, oxygen is absorbed by the lungs and nutrients are absorbed by the small intestine. In a single-celled organism, this absorption directly involves the

Select one of the following:

  • nucleus

  • chloroplasts

  • cell membrane

  • mitochondria

Explanation

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