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Plants General Structure PowerPoint Presentation

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komalgotwal

Description : Ppt Presentation on Plants General Structure which is created by Rik G and available for free download Plants General Structure powerpoint presentation.

Tags : Plants

Published on : Aug 18, 2018
Views : 1227 | Downloads : 0

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Plants General Structure Presentation Transcript

Slide 1 -

Plants Structure – Leaves stem roots

Slide 2 -

Leaves

Slide 3 -

Function of leaves Trap light energy for photosynthesis Producing sugar from photosynthesis Exchange of gases – oxygen and carbon dioxide

Slide 4 -

ppt slide no 4 content not found

Slide 5 -

Structure Wide Helps to catch more light energy Thin Help get carbon dioxide from bottom to top of leaf for photosynthesis

Slide 6 -

Leaf structure Greener on top CO2 gets in here

Slide 7 -

Leaf diagram – palisade layer CO2 Most chlorophyll

Slide 8 -

Leaf cell - palisade Position? Upper surface of leaf Features? Box shape Chloroplasts Function? Photosynthesis

Slide 9 -

Gas exchange Leaves are designed to allow carbon dioxide to get to the main chlorophyll layer at the top of the leaf They have small holes called stomata on the under surface Each hole is open & closed by 2 guard cells

Slide 10 -

Leaf diagram – stoma and guard cells

Slide 11 -

Stoma position

Slide 12 -

Stoma is a small hole Its size is controlled by 2 guard cells closed open

Slide 13 -

Stoma function is for gas exchange in the leaf Carbon dioxide oxygen Guard cell Provided plant is photosynthesising

Slide 14 -

Stomata open and close at different times of the day When it is light the plant needs CO2 for photosynthesis so the stoma open At night (darkness) they close

Slide 15 -

Gas exchange

Slide 16 -

Roots – function and structure Hold plant in position Absorb water and minerals from the soil Specialised cells to increase surface area for water intake

Slide 17 -

Wheat seed Root hairs Fragile parts of cells that grow from the main root They massively increase the surface area for absorption

Slide 18 -

Root hair cells (x150)

Slide 19 -

Root ‘B’ has had the hairs damaged -

Slide 20 -

ppt slide no 20 content not found

Slide 21 -

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