Biology-B2-Structure of a Leaf 0.0 / 5 ? BiologyPhotosynthesis and transpirationGCSEAQA Created by: tonisha_Created on: 28-03-22 19:38 Draw a simple diagram of the leaf search up image :) 1 of 24 What is a leaf literally? an organ 2 of 24 What is the main purpose of the epidermis? to protect the surface of the leaf 3 of 24 What is an adaptation of the upper epidermis? it is transparent to allow light to pass through to the photosynthetic cells in the palisade layer 4 of 24 What is the upper epidermis covered with? an oily material called the waxy cuticle 5 of 24 What is the purpose of the waxy cuticle?(2) prevents water loss by evaporation it also prevents the leaf from drying out 6 of 24 What does the lower epidermis contain? tiny pores called stomata 7 of 24 What does the stomata allow? allows oxygen to leave and carbon dioxide to enter the leaf 8 of 24 What do we find on either side of the stomata? guard cells 9 of 24 What is the purpose of the guard cells? they are light sensitive open-day 10 of 24 Why are the guard cells closed at night? as no photosynthesis is taking place 11 of 24 What does the palisade mesophyll consist of? palisade cells 12 of 24 What are palisade cells packed full of? chloroplasts 13 of 24 What takes place in the palisade mesophyll? most photosynthesis 14 of 24 What is the spongy mesophyll full of? air spaces 15 of 24 Why does the spongy mesophyll have air spaces? to allow the easy diffusion path for carbon dioxide and oxygen 16 of 24 What is the role of the xylem? it transports water from the roots to the stem and leaves 17 of 24 The xylem may also transport dissolved? mineral ions 18 of 24 For example? magnesium 19 of 24 What is magnesium used to make? chlorophyll 20 of 24 What does the phloem transport? dissolved sugar produced from photosynthesis from the leaves to the rest of the plant 21 of 24 What is the movement of sugars and other molecules through the phloem called? translocation 22 of 24 Where is meristem tissue found? examples? at the growing tips of plants e.g. shoots and roots 23 of 24 What do meristem tissues contain? stem cells 24 of 24
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