PLANT ORGANISATION

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Biology

Biochemistry

Last updated 8:59 AM on 11/23/22
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17 Terms

1
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What do plant tissues contain(6)
epidermal tissues, palisade mesophyll, spongy mesophyll, xylem and phloem
2
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How is the upper epidermis adapted
thin,waxy cuticle
3
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How does a thin upper epiderms help
allow light to photosynthetic cells
4
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How does waxy cuticle help
reduces water evaporation
5
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How is the lower epidermis adapted
stomata
6
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What is the function of stomata
take in CO2, release O2
7
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What do guard cells do
regulate the closing/opening of stomata
8
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What does the palisade mesophyll contain
palisade cells with chloroplasts
9
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What do chloroplasts do
absorb light energy for photosynthesis
10
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How is the spongy mesophyll adapted
full of air spaces
11
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How do air spaces help spongy mesophyll
CO2 diffuses from stomata to palisade, O2 diffuses out of palisade to stomata
12
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What do xylem cells do
transpiration stream, water and mineral salts from roots up to stem/leaves
13
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What do phloem cells do
translocation, dissolved sugars from leaves to rest of plant
14
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What does meristem tissue contain
stem cells which differentiate into different types of plant tissue
15
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How do guard cells open stomata
Taking up water by osmosis then SWELLING
16
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What happens when water is abundant
The water can afford to lose water so stomata are opened to allow gases for photosynthesis to move freely in and out of cell
17
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What happens when water is scarce