Flashcards
B4-c
Flashcards do conjunto (18)
- 1DIAGRAM OF LEAF STRUCTUREIN FOLDER
- 2what are the three types of cells that can photosynthesisepalisade, guard cells, spongy mesophyll
- 3which cell carries out the most photosynthesispalisade- they have the most chloroplasts
- 4why does the top of a leaf look greener than the bottomthe bottom has a stoma (stomata as plural)
- 5why does the top surface of the leaf look shinier than the bottomthe top has a waxy cuticle
- 6CUPSCuticle
Upper epidermis
Palisade
Spongy mesophyll - 7characteristics of a leaftransparent- the cells that cover the leaf surface allows light to pass through them
chlorophyll- the second to top layer of cells absorbs the most light
gaps - cells in the next layer down are shaped to allow gases to diffuse rapidly in and out of them
spherical( 3rd layer down)- gases can disuse easily around them - 8HOW ARE LEAVES ADAPTED FOR PHOTOSYNTHESIS: leaf structure adaption- broad leave shave a large surface area why does this make photosynthesis more efficient ?lots of space for the light to strike the leaf, so allows a large amount of light energy to be absorbed
- 9adaption- thins leaves have short distance for gases to diffuse why does this make photosynthesis more efficient ?allows faster diffusion of carbon dioxide from the atmosphere to the cells that are carrying out photosynthesis
- 10adaption- contain chlorophyll and other pigments to absorb light from different parts of the spectrum why does this make photosynthesis more efficient ?many wavelengths of light can be absorbed, allowing the leaf to use the maximum amount of energy possible from the sunlight
- 11adaption- have a network of vascular bundles for support and transport why does this make photosynthesis more efficient ?provide a source of water (used in photosynthesis ) and carry away the products of photosynthesis for storage
- 12adaption- have guard cells that open and close the stomata why does this make photosynthesis more efficient ?stomata can open when carbon dioxide is required ( and close to prevent water escaping when there is littler water available)
- 13HOW ARE LEAVES ADAPTED FOR PHOTOSYNTHESIS: cellular structure adaption - epidermal cells are thin and transparent why does this make photosynthesis more efficient ?allows light to the inner cells of the leaf
- 14adaption- palisade cells have most chloroplasts why does this make photosynthesis more efficient ?allowing for maximum absorption of light, because these are in the upper region of the leaf
- 15adaption- palisade cells mainly have chloroplasts downs the side why does this make photosynthesis more efficient ?allows some light to reach past this layer to the mesophyll cells
- 16adaption- air spaces in the spongy mesophyll why does this make photosynthesis more efficient ?allows gases to diffuse easily from the stomata to reach all the cells in the leaf
- 17adaption- mesophyll cells are small and so have a large surface area to volume ratio why does this make photosynthesis more efficient ?provides lots of room for gases to enter and leave the cells, so gas exchange is quick
- 18—
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- FlashCards sobre B4-c, criado por Emer Neave em 13-03-2016.
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