Ecosystem and Plant Biology Quiz

Which plant tissue is responsible for moving water and minerals up from the roots?

• xylem

• phloem

• stomata

• transpiration

What is the main function of stomata in leaves?

• To open and close to let in air or give off water vapor

• To move food throughout the plant

• To release water vapor through the plant

• To break down dead plant material

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If an animal hunts other animals for food, what is it called?

• Predator

• Prey

• Decomposer

• Fungi

Explain how invasive species can affect an ecosystem. Use reasoning and evidence in your answer.

• They can cause harm by disrupting the balance of the ecosystem and outcompeting native species.

• They help native species grow faster.

• They only live in their original habitat and do not affect other ecosystems.

• They always improve the ecosystem by adding more diversity.

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A scientist finds an organism that breaks down dead plant and animal material. What type of organism is this, and why is it important in an ecosystem?

• Decomposer; it helps recycle nutrients back into the ecosystem.

• Predator; it controls the population of other animals.

• Prey; it provides food for other animals.

• Bacteria; it causes diseases in plants and animals.

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Which process describes the evaporation of water from a plant's leaves?

• Transpiration

• Photosynthesis

• Respiration

• Condensation

What materials do plants use to make their own food?

• Carbon dioxide, water, and light energy from the sun

• Oxygen, nitrogen, and soil

• Sugar, oxygen, and minerals

• Water, sugar, and carbon monoxide

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Why can't plants grow too close together?

• Their roots need to spread out and absorb nutrients from the soil

• They need more sunlight

• They produce too much oxygen

• They attract too many animals

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In an ecosystem, what is a limiting factor that can affect the number of organisms living there?

• Amount of water

• Amount of sunlight

• Number of predators

• Size of the ecosystem

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Which of the following is NOT an example of a biotic factor?

• Rock

• Fungus

• Bacteria

• Animals