12/19 🌈 Living Environment Regents Review 2

Front

What is homeostasis?

Back

Homeostasis is the process by which a biological system maintains a stable internal environment despite external changes.

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What role do hormones play in maintaining homeostasis?

Back

Hormones are chemical messengers that regulate various physiological processes, including metabolism, growth, and homeostasis.

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What is genetic engineering?

Back

Genetic engineering is the manipulation of an organism's DNA to alter its characteristics, often involving the transfer of genes between organisms.

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What is the significance of hypotheses in scientific research?

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Hypotheses are proposed explanations that can be tested through experimentation; they are valuable even if proven false, as they can lead to further investigation.

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How does deforestation impact carbon dioxide levels in the atmosphere?

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Deforestation increases carbon dioxide levels because trees absorb CO2; when they are removed, less CO2 is absorbed, leading to higher concentrations in the atmosphere.

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What is the process of DNA replication?

Back

DNA replication is the process by which a cell makes an identical copy of its DNA before cell division.

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What is natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What is gel electrophoresis used for?

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Gel electrophoresis is a laboratory technique used to separate DNA, RNA, or proteins based on their size and charge.

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What is the impact of human activities on ecosystems?

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Human activities, such as pollution, deforestation, and urbanization, can disrupt ecosystems, leading to loss of biodiversity and habitat destruction.

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What is the difference between an observation and an inference?

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An observation is a statement based on what one sees, hears, or experiences, while an inference is a conclusion drawn from observations.