4/2 quiz

What is the main job of the xylem?

• To make food for the plant

• To move water from leaves to roots

• To carry water from roots to leaves

• To help the plant grow flowers

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What does the phloem carry through the plant?

• Water

• Air

• Sugar and nutrients

• Dirt and sand

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Where does the xylem start in the plant?

• In the flower

• In the roots

• In the leaves

• In the stem

Which way does phloem move sugar?

• Only up

• Only down

• Side to side

• Up and down, depending on the plant’s needs

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What are stomata?

• Roots that soak up water

• Tiny holes on the stem

• Pores on leaves that open and close

• Tubes that carry sugar

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What happens when stomata are open?

• Sugar comes out

• Air and water vapor move in and out

• The plant grows faster

• Roots take in more soil

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What is transpiration?

• Water flowing into the soil

• Sugar leaving the stem

• Water evaporating from the leaves

• Roots growing longer

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Why is transpiration helpful to a plant?

• It keeps insects away

• It helps pull more water up from the roots

• It changes sugar into water

• It makes the plant grow taller

What happens if the stomata stay closed too long?

• The plant makes too much food

• Too much water escapes

• The plant can’t get enough carbon dioxide

• The roots dry out

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What do xylem and phloem have in common?

• They are both parts of the root only

• They help the plant breathe

• They both transport things the plant needs

• They both make seeds grow

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