Do now! 1. The process in which water exits the leaf through the stomata is called _____________ 2. Stomata are tiny ______ located on the ________ epidermal layer of the leave. The location of the stomata prevents too much ________ loss transpiration holes lower water
Leaf adaptation and flowers Ms Jan
Leaves are designed to: Catch as much sunlight as possible – wide and flat Catch as much sunlight as possible – wide and flat Use as much sunlight as possible – thin with lots of chlorophyll Use as much sunlight as possible – thin with lots of chlorophyll Allow CO 2 in and O 2 out – stomata and air spaces Allow CO 2 in and O 2 out – stomata and air spaces
Gas exchange
Guard cells Guard cells (guards the stomata) control how much air and water enter and leave the leaves. If a plant loses too much water it wilts. The cuticle (waxy layer on the top) also stops water loss.
Plant structure Plants are designed to spread out their leaves to get as much sunlight as possible without blocking other leaves – usually a pyramid shape.
Flowers The sex organs of plants
FEMALE MALE POLLINATION
Pollination Pollination happens when pollen from the anther (male part) lands on the stigma (female part). After the pollen lands on the stigma it germinates and grows a pollen tube down to the ovary.
Pollen
Fertilisation Fertilisation is when the pollen (sperm) meets the ovule (egg) The result is a fertilised ovule – a seed
Glossary Flower, Stem, Leaf, Roots, Phloem, Xylem, Osmosis, Transpiration, Wilt, Photosynthesis, Respiration, Deforestation, Gymnosperm, Angiosperm, Monocotyledon, Dicotyledon, Moss, Algae, Liverwort, Stomata, Cuticle, Guard cell, Epidermal layer, Spongy layer, Palisade, Carbon dioxide, Chlorophyll, Chloroplast Flower, Stem, Leaf, Roots, Phloem, Xylem, Osmosis, Transpiration, Wilt, Photosynthesis, Respiration, Deforestation, Gymnosperm, Angiosperm, Monocotyledon, Dicotyledon, Moss, Algae, Liverwort, Stomata, Cuticle, Guard cell, Epidermal layer, Spongy layer, Palisade, Carbon dioxide, Chlorophyll, Chloroplast