Living Environment Regents Questions

What is a control group in an experiment?

• The group that receives the experimental treatment.

• The group that is not affected by the experiment.

• The part of the experiment that serves as a basis of comparison and does not receive the experimental treatment.

• The group that is monitored for changes during the experiment.

What is the significance of biodiversity?

• Biodiversity refers to the variety of life in an ecosystem, which contributes to resilience and stability.

• Biodiversity is the number of species in a specific area, which has no impact on ecosystem health.

• Biodiversity is the total biomass of organisms in an ecosystem, which determines its productivity.

• Biodiversity is the genetic variation within a single species, which is irrelevant to ecosystem dynamics.

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What are natural predators?

• Organisms that help maintain ecological balance by controlling the population of other species.

• Species that are hunted by other animals for food.

• Plants that provide shelter for various animal species.

• Animals that migrate to different habitats for survival.

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What is the significance of ecological succession?

• It is the process by which ecosystems change and develop over time, leading to increased biodiversity and stability.

• It refers to the immediate response of ecosystems to environmental changes.

• It is a method of controlling invasive species in an ecosystem.

• It describes the seasonal changes in an ecosystem's climate.

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What is the difference between an experimental group and a control group?

• The experimental group receives the treatment being tested, while the control group does not, allowing for comparison.

• Both groups receive the same treatment to ensure consistency.

• The control group receives the treatment, while the experimental group does not.

• The experimental group is larger than the control group to ensure accurate results.

Define antigen.

• A substance that the immune system recognizes as foreign, prompting an immune response.

• A type of white blood cell that fights infections.

• A vaccine that helps prevent diseases.

• A protein that helps in blood clotting.

What is the role of insulin in the body?

• Insulin helps maintain blood sugar levels by regulating glucose uptake in cells.

• Insulin is responsible for the production of red blood cells.

• Insulin aids in the digestion of proteins and fats.

• Insulin is a hormone that increases blood sugar levels.

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How do vaccines work in the immune system?

• Vaccines stimulate the immune system to recognize and fight pathogens by introducing a harmless component of the pathogen.

• Vaccines directly kill pathogens in the body to prevent disease.

• Vaccines provide immediate immunity by injecting antibodies into the bloodstream.

• Vaccines alter the DNA of pathogens to make them harmless.

What is selective breeding?

• A process of randomly mating plants and animals

• A method of enhancing traits by choosing specific plants or animals to reproduce

• A technique for eliminating undesirable traits in species

• A way to create genetically modified organisms

How can environmental changes affect species survival?

• They can lead to increased food availability and habitat expansion.

• They can disrupt ecosystems, leading to challenges in food availability, habitat loss, and increased competition.

• They have no significant impact on species survival.

• They can enhance biodiversity and promote species growth.

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