Biology: Ecosystems and Enzymes Quiz

Which of the following best describes how ecosystems change due to seasonal variations?

• Ecosystems remain constant throughout the year.

• Ecosystems experience changes in species behavior and population dynamics.

• Ecosystems are unaffected by seasonal changes.

• Ecosystems only change due to human intervention.

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How does climate change affect ecosystems over time?

• It causes ecosystems to become more stable.

• It leads to shifts in species distribution and habitat loss.

• It has no impact on ecosystems.

• It only affects aquatic ecosystems.

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What is the primary function of the roots in a plant?

• Photosynthesis

• Water and nutrient absorption

• Seed production

• Pollination

Which plant organ is primarily responsible for photosynthesis?

• Roots

• Stems

• Leaves

• Flowers

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How does a mutation in a cell's DNA potentially lead to cancer?

• By causing the cell to die immediately

• By disrupting the normal cell cycle and leading to uncontrolled cell growth

• By making the cell immune to viruses

• By enhancing the cell's normal functions

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What role do enzymes play in biochemical reactions?

• They increase the activation energy required for reactions.

• They act as catalysts to lower the activation energy.

• They are consumed in the reaction.

• They prevent reactions from occurring.

Which factor can affect enzyme activity by altering its shape?

• Light intensity

• pH level

• Sound waves

• Magnetic fields

What is one potential impact of biotechnology on society?

• It has no impact on society.

• It can lead to ethical concerns regarding genetic modification.

• It only affects agricultural practices.

• It is solely beneficial with no drawbacks.

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How does biotechnology impact the environment?

• It has no environmental impact.

• It can lead to increased biodiversity.

• It can result in unintended harm to ecosystems.

• It only affects urban areas.

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What is ecological succession?

• The immediate change in an ecosystem due to a natural disaster

• The gradual process of change and replacement of species in a community

• The sudden extinction of a species

• The introduction of invasive species

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