Flashcard Set Preview
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| 1 |
Lamina - what is?
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Is the leaf blade
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| 2 |
What is a Petiole
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It is the stem a leaf is carried on, may extend along the centre of the leaf forming the Mid-rib
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| 3 |
Where does the leaf grow from on the stem
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From the NODE on the stem
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| 4 |
What is the name of the angle formed by the leaf and the stem
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LEAF AXIL
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| 5 |
Where are the axillary buds found
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in the LEAF AXIL
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| 6 |
What are the leaf characteristics (There are 6)
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* Leaf Structure
* Attachment
* Arrangement
* Shape
* Venation
* Margin
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| 7 |
What is LEAF STRUCTURE
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Refers to the lamina of the leaf, is it simple or compound
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| 8 |
What is leaf attachment
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How the leaf joins the stem
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| 9 |
What is arrangement
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The distinctive pattern of how the leaf grows on the stem - how the leaves are arranged in...
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| 10 |
What is the leaf shape?
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The smape of the lamina of leaf or leaflets
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| 11 |
What is the leaf Venation?
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The pattern of the veins on a leaf
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| 12 |
What is the leaf Margin?
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The edge of the lamina
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| 13 |
What makes a compound leaf different from a simple leaf (referring to leaf structure)
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A compound leaf has leaflets (multiple parts)
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| 14 |
What is a compound leaf called if the leaflets grwo from the continuation of the petiole &...
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The leaf is called a pinnate
The leaflets are called pinnae
Ie. Elder (sambucus nigra)
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| 15 |
What are pinnules
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Pinnae that are divided up into further leaflets
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| 16 |
What is a palmate
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It is where the pinnae grwo from the end of a petiole ie. trifolium pratense (red clover)
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| 17 |
Name 3 standard leaf attachments
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Articulate - definate joint can be seen
Petiolate - petiole connects the leaf to the stem
Sessile...
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| 18 |
What is sheathing
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It is a special leaf attachment - bases of petioles wrap around the stem eg Petrolselinum crispum (parsley)
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| 19 |
What is decurrent & perfoliate
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Decurrent - where the lamina extends onto the side of the stem ie. Comfrey - Symphytum officinale
Perfoliate...
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| 20 |
What are the 4 types of leaf arrangement
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Alternate - only 1 leaf growing on each node
Alternate distichous is when it appears...
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| 21 |
What does penniveined mean?
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Small veins run parallel to eachother away from the mid rib on a monocot plant
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| 22 |
What does Runcinate, Lyrate & Palmatifid refer to when describing a leaf
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The leaf indentation
Runcinate - sharp indentations, widest at the apens and tapering towards...
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| 23 |
Why is the leaf surface coated in cuticle
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To prevent excessive water loss
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| 24 |
What is stomata
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Special openings that can open and clsoe for gas exchage preventing excessing water loss
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| 25 |
Name the 3 vestiture on the surface of leaves
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Glabrous - smooth surface w/out hairs or other covering
Glaucous - bluish waxy surface - eucalypts/mango
Pubescent...
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| 26 |
Stipules
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Small leaf like structures found in pairs on the base of the petiole
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| 27 |
Ochrea?
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Membranous sheath found around the nodes of certain plans - formed from fused stipules
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| 28 |
What is the leafs function
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1/ Photo synthesis
2/ Maintenace of water balance
3/ Gaseous exchange
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| 29 |
Photosynthesis - how does it work
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The plant processes the suns energy to join carbon, hydrogen and oxygen into sugar molecules
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| 30 |
What makes a plant green & why is it needed
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Chlorophyll - needed to absorb the light energy
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| 31 |
What is the difference between Autotrophs & hereotrophs
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Autotrophs - Can make their own food - most plants are autotrophs
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| 32 |
What is an example of a bract
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Asteracea family - long thin bracts around flower head
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| 33 |
What are leaf modifications
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Tendrils - wrap around structures
Spines - protection for plant
Bracts - Grow at base of...
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