Chapter 4 - Photosynthesis

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Photosynthesis

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10 Terms

1

Photosynthesis

the process by which plants convert carbon dioxide and water into sugars using sunlight as energy in the presence of chlorophyll.

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2

Light intensity

The limiting factor on the rate of photosynthesis besides, carbon dioxide concentration and temperature

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3

cuticle

protects the epidermis and prevents excessive water loss through evaporation.

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4

Guard Cells

Bean-shaped, chloroplast-containing cells located in the lower epidermis.

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5

Upper epidermis

single layer of irregular, closely packed cells covered by a layer of waxy cuticle.

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6

Palisade mesophyll

cells that are columnar in shape and closely packed

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7

Spongy mesophyll

cells that are irregular in shape with numerous intercellular air spaces around them to allow for fast diffusion of carbon dioxide

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8

Vascular Bundles

The name given to xylem and phloem tissues collectively

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9

Stomata

Structures in plants, opened during the day for carbon dioxide intake and closed during the night to minimise water loss through transpiration.

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10

Flaccid

The appearance of guard cells when there is excessive water loss, even during the day, and they lose turgor

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