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LIFE SCIENCE 4
Fichas del conjunto (9)
- 1LIFE SCIENCE 4WELCOME TO CHAPTER 4
- 2PLANTS *FOOD PRODUCTION IN PLANTSnutrition~process by which all living organisms take in food +use it for energy and growth
plants~producers
animals~consumers - 3*continuationplants use simple inorganic substances to make complex organic foods
plants leaves contain a green pigment(s) called chlorophyll -absorb +trap sunlight E
PROCESS BY WHICH PLANTS MAKE FOOD =PHOTOSYNTHESIS - 4INTERNAL STRUCTURE OF LEAVESTHERES A DIAGRAM ON PAGE 36 CONSISTING OF:
#stomata
#lower epidermis
#vascular bundle
#spongy cell
#chloroplast
#palisade cell
#upper epidermis
#cuticle - 5FUNCTIONS OF LEAVES#food production -photosynthesis
#transpiration-gtting rid of excess water
#respiration-exchange of gases
#storage of food + water - 6PHOTOSYNTHESIS PHOTO-LIGHT SYNTHESIS-MAKINGprocess whereby green plants(chemical-chlorophyll) make their own food(glucose-carbohydrates) in the presence of sunlight using C02 from the air and H20 from soil
- 7WORD EQAUTIONWATER + CARBON DIOXIDE -SUNLIGHT/CHLOROPHYLL=GLUCOSE (CARBOHYDRATES) + OXYGEN
- 8CHEMICAL EQAUTION6H20 +6C02-SUNLIGHT/CHLOROPHYLL =C6H12O6+602
- 9ADAPTATION OF LEAVES FOR PHOTOSYNTHESIS# green pigment (chloropyll +chloroplast)
-absorb sunlight
#large surface area -maximise amount of sunlight and C02
#thin cross-section-nearly all xells are exposed to sunlight
#reduced distance to travelled by C02 +sunlight to cells
#large number of stomata(mainly underneath)
#maximise amount of C02
#dense network of veins -enables effeciant supply of water to cells