Leaf - Revision history

NRJC: /* Key Stage 4 */

2019-06-08T10:37:16Z

‎Key Stage 4

NRJC at 21:06, 7 April 2019

2019-04-07T21:06:48Z

NRJC: /* Examples */

2019-04-07T19:38:05Z

‎Examples

NRJC at 12:04, 4 April 2019

2019-04-04T12:04:52Z

NRJC: /* Examples */

2019-04-04T12:04:24Z

‎Examples

NRJC at 14:19, 3 April 2019

2019-04-03T14:19:16Z

NRJC at 14:18, 3 April 2019

2019-04-03T14:18:57Z

NRJC: /* Key Stage 4 */

2018-11-18T10:06:23Z

‎Key Stage 4

NRJC: /* Key Stage 4 */

2018-11-18T10:05:17Z

‎Key Stage 4

NRJC: /* Key Stage 3 */

2018-11-18T10:04:40Z

‎Key Stage 3

@@ Line 80: / Line 80: @@
 ===Meaning===
 A [[leaf]] is an [[organ]] in the [[Shoot System|shoot system]] of a [[plant]] that uses [[photosynthesis]] to [[Producer|produce]] food for the [[plant]].
 ===Adaptations for Photosynthesis===
@@ Line 86: / Line 101: @@
 : '''Leaves''' have [[air]] gaps between the [[Spongy Mesophyll Cell|spongy mesophyll cells]] to allow [[Gas Exchange in Plants|gas exchange]].
 : [[Xylem Tissue]] transports [[water]] to the '''leaves''' for [[photosynthesis]].
-: '''Leaves''' usually have more [[Guard Cell|guard cells]] and [[Stoma|stomata]] on the underside (lower epidermis) than the top side (upper epidermis). These close when the [[leaf]] gets [[dehydrate]]d, stopping [[Carbon Dioxide|carbon dioxide]] getting into the [[leaf]] which stops them using [[water]] for [[photosynthesis]].
+:  '''Leaves''' have [[Guard Cell|guard cells]] around a [[stoma]] which closes when the [[leaf]] gets [[dehydrate]]d, stopping [[Carbon Dioxide|carbon dioxide]] getting into the [[leaf]]. This stops them using [[water]] for [[photosynthesis]] and helps protect the plant from further dehydration.

@@ Line 53: / Line 53: @@
 : '''Leaves''' produce food that is sent to the [[root]]s through the [[phloem]] which is part of a [[Plant Vein|plant vein]] that carries sap.
 '''Leaves''' have many tissues inside them found in layers:
-*Upper Epidermis - A layer of cells at the top of the leaf that make a waxy cuticle on top to keep the [[leaf]] [[waterproof]].
+*Upper Epidermis - A layer of cells at the top of the leaf that make a waxy cuticle on top to keep the [[leaf]] waterproof.
 *[[Palisade Tissue]] - A layer of [[Palisade Cell|palisade cells]] which have lots of chloroplasts in them for [[photosynthesis]].
 *[[Spongy Mesophyll Tissue]] - A layer of [[Spongy Mesophyll Cell|spongy mesophyll cells]] that have irregular shapes to allow [[air]] to pass through the [[leaf]].

@@ Line 15: / Line 15: @@
 |[[File:OakLeaf.png|center|200px]]
 |-
-|These are the '''leaves''' on a Horse Chestnut Tree.
+| style="height:20px; width:200px; text-align:center;" |These are the '''leaves''' on a Horse Chestnut Tree.
-|This is a '''leaf''' from a Beech Tree
+| style="height:20px; width:200px; text-align:center;" |This is a '''leaf''' from a Beech Tree
-|This is an Oak Tree '''leaf'''.
+| style="height:20px; width:200px; text-align:center;" |This is an Oak Tree '''leaf'''.
 |-
 |[[File:AshLeaf.png|center|200px]]
@@ Line 23: / Line 23: @@
 |[[File:CedarLeaf.png|center|200px]]
 |-
-|3 '''leaves''' from an Ash Tree.
+| style="height:20px; width:200px; text-align:center;" |3 '''leaves''' from an Ash Tree.
-|A Silver Birch Tree '''leaf'''.
+| style="height:20px; width:200px; text-align:center;" |A Silver Birch Tree '''leaf'''.
-|These are the '''leaves''' of a Cedar Tree
+| style="height:20px; width:200px; text-align:center;" |These are the '''leaves''' of a Cedar Tree
 |-
 |[[File:FirLeaf.png|center|200px]]
@@ Line 31: / Line 31: @@
 |[[File:HollyLeaf.png|center|200px]]
 |-
-|These are the '''leaves''' of a Fir Tree.
+| style="height:20px; width:200px; text-align:center;" |These are the '''leaves''' of a Fir Tree.
-|These Pine Tree '''leaves''' are called Pine Needles.
+| style="height:20px; width:200px; text-align:center;" |These Pine Tree '''leaves''' are called Pine Needles.
-|These are the '''leaves''' of a Holly Tree.
+| style="height:20px; width:200px; text-align:center;" |These are the '''leaves''' of a Holly Tree.
 |}

@@ Line 42: / Line 42: @@
 ===Adaptations===
 : The '''leaf''' is often wide and thin to collect as much sunlight as possible. The more sunlight it collects the more food it can make.
-: The '''leaf''' has tubes called 'veins' inside it which carry the food away from the '''leaves''' to the [[roots]] and [[flower]] and to carry [[water]] into the '''leaf''' from the [[roots]].
+: The '''leaf''' has tubes called 'veins' inside it which carry the food away from the '''leaves''' to the [[root]]s and [[flower]] and to carry [[water]] into the '''leaf''' from the [[root]]s.
 ==Key Stage 3==

@@ Line 15: / Line 15: @@
 |[[File:OakLeaf.png|center|200px]]
 |-
-|These are the '''leaves''' on a [[Horse Chestnut Tree]].
+|These are the '''leaves''' on a Horse Chestnut Tree.
-|This is a '''leaf''' from a [[Beech Tree]]
+|This is a '''leaf''' from a Beech Tree
-|This is an [[Oak Tree]] '''leaf'''.
+|This is an Oak Tree '''leaf'''.
 |-
 |[[File:AshLeaf.png|center|200px]]
@@ Line 23: / Line 23: @@
 |[[File:CedarLeaf.png|center|200px]]
 |-
-|3 '''leaves''' from an [[Ash Tree]].
+|3 '''leaves''' from an Ash Tree.
-|A [[Silver Birch Tree]] '''leaf'''.
+|A Silver Birch Tree '''leaf'''.
-|These are the '''leaves''' of a [[Cedar Tree]]
+|These are the '''leaves''' of a Cedar Tree
 |-
 |[[File:FirLeaf.png|center|200px]]
@@ Line 31: / Line 31: @@
 |[[File:HollyLeaf.png|center|200px]]
 |-
-|These are the '''leaves''' of a [[Fir Tree]].
+|These are the '''leaves''' of a Fir Tree.
-|These [[Pine Tree]] '''leaves''' are called Pine Needles.
+|These Pine Tree '''leaves''' are called Pine Needles.
-|These are the '''leaves''' of a [[Holly Tree]].
+|These are the '''leaves''' of a Holly Tree.
 |}

@@ Line 65: / Line 65: @@
 ===Adaptations of Leaves===
-: '''Leaves''' have a [[Waxy Cuticle|waxy cuticle]] to stop [[water]] escaping.
+: '''Leaves''' have a waxy cuticle to stop [[water]] escaping.
 : '''Leaves''' contain [[Cell (Biology)|cells]] with many [[chloroplast]]s for [[photosynthesis]].
 : '''Leaves''' have [[air]] gaps between the [[Spongy Mesophyll Cell|spongy mesophyll cells]] to allow [[Gas Exchange in Plants|gas exchange]].

← Older revision		Revision as of 10:04, 18 November 2018
Line 76:		Line 76:
	\| style="height:20px; width:400px; text-align:center;" \|The under side of a [[leaf]] showing [[Guard Cell\|guard cells]] and [[Stoma\|stomata]].		\| style="height:20px; width:400px; text-align:center;" \|The under side of a [[leaf]] showing [[Guard Cell\|guard cells]] and [[Stoma\|stomata]].
	\|}		\|}
		+
		+	==Key Stage 4==
		+	===Meaning===
		+	[[File:LeafCrossSection.png\|right\|300px\|thumb\|A cross section of a [[leaf]].]]
		+	A [[leaf]] is an [[organ]] in the [[Shoot System\|shoot system]] of a [[plant]] that uses [[photosynthesis]] to [[Producer\|produce]] food for the [[plant]].
		+
		+	===Adaptations for Photosynthesis===
		+	: '''Leaves''' are usually wide and thin to provide a large area to collect sunlight.
		+	: '''Leaves''' contain [[Cell (Biology)\|cells]] with many [[chloroplast]]s for [[photosynthesis]].
		+	: '''Leaves''' have [[air]] gaps between the [[Spongy Mesophyll Cell\|spongy mesophyll cells]] to allow [[Gas Exchange in Plants\|gas exchange]].
		+	: '''Leaves''' usually have more [[Guard Cell\|guard cells]] and [[Stoma\|stomata]] on the underside (lower epidermis) than the top side (upper epidermis). These close when the [[leaf]] gets [[dehydrate]]d, stopping [[Carbon Dioxide\|carbon dioxide]] getting into the [[leaf]] which stops them using [[water]] for [[photosynthesis]].