Plant transport and transpiration
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the role of phloem? | To transport sugars from leaves around the plant
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| What is the role of xylem? | To transport water from roots up the plant
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| What is transpiration? | process by which water is pulled up the plant
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| Why do plants need water? | for light dependent stage of photosynthesis
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| Which factors increase the rate of transpiration? | increased temperature, increased wind, lower humidity
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| What strengthens xylem? | rings of lignin
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| What cells help phloem survive? | companion cells
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| what is the role of waxy cuticle on a leaf? | prevents water loss
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| what is the role of epidermis in a leaf? | protection
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| what is the role of mesophyll in a leaf? | it is where most of photosynthesis occurs.
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| what are two types of mesophyll? | palisade and spongy
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| what are stomata? | holes where gas exchange occurs in lower epidermis of leaves
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| what are guard cells? | cells that control opening and closing of stomata
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| how do stomata open? | water enters the guard cells by osmosis (they become turgid) and stomata opens
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| how do stomata close? | water leaves the guard cell by osmosis (they become plasmolysed) and stomata close
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| How does transpiration work? | water evaporates through open stomata which draws more water up from roots
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| What plant cells absorb water from the soil? | root hair cells
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| How are root hair cells adapted to absorbing water? | they have a large surface area.
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| what gas enters the leaves through stomata? | carbon dioxide
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| Why does carbon dioxide need to enter leaves? | to be used in carbon fixation stage of photosynthesis
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| What gas leaves the leaves through stomata? | oxygen
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| Where does the oxygen that leaves leaves come from? | it is a byproduct of light dependent reaction in photosynthesis
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| Are stomata open during the day or at night? | stomata are open during the day
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| Are stomata closed during the day or at night? | stomata are closed during the night
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| Why are stomata open during the day? | when there is light plant needs to be able to do gas exchange for photosynthesis
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| why are stomata closed during the night? | there is no light so photosynthesis does not occur, stomata are closed to conserve water
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Created by:
dr.prorocic
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