What are the reactants and products of photosynthesis? –Reactants = water, CO 2, and sunlight...

What are the reactants and products of photosynthesis?– Reactants = water, CO2, and sunlight

– Products = glucose and O2

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Structure and

function of plants

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Structure FunctionsStructure Functions AdaptationsAdaptations

FlowersFlowers

Structure and FunctionStructure and Function

Anther: produces pollen

Pollen: haploid male gametes (sex cells)

Stigma & Style: Sticky top of style where pollen lands. The style transports it to the ovary.

Ovary: Female organ which produces female gametes.

Adaptation to Adaptation to EnvironmentEnvironment

1. Bright colors and sweet nectar to attract pollinators.

2. Development of fruit for seed dispersal.

LeavesLeaves

Leaf structure

Greener on top

CO2 gets in here

StructureStructure

Upper Upper EpidermisEpidermis

Palisade Palisade LayerLayer

Lower Lower EpidermisEpidermis

FunctionFunction

contains cuticle contains cuticle prevents water lossprevents water loss

Light reactions of photosynthesis.

Lets COLets CO22 in and O in and O22 and water out and water out (stomata)(stomata)

Function of leaves

• Trap light energy for photosynthesis

• Produce sugar from photosynthesis

• Exchange of gases – carbon dioxide (in) and oxygen (out)

StructureWide

Helps to catch more light energy

Thin

Helps get carbon dioxide from bottom to top of leaf for photosynthesis

Stoma is a small holeIts size is controlled by 2 guard cells

closed open

Stoma function is for gas exchange in the leaf

Carbon dioxide

oxygenGuard cell

Provided plant is photosynthesising

Adaptations Adaptations to to

environmenenvironmentt

Thick cuticle in Thick cuticle in dry climates.dry climates.

Few Few stomata stomata to prevent to prevent water loss.water loss.

Reduced Reduced surface surface area to prevent area to prevent water loss. water loss.

(cactus) (cactus)

StemsStems

StructureStructure

XylemXylem

PhloemPhloem

Function Function

vascular tissue (tubes) vascular tissue (tubes) that carries that carries waterwater from from the roots to other the roots to other parts of the plantparts of the plant

Vascular tissue that Vascular tissue that carries carries sugar (food)sugar (food)

Stems

• Stems can be herbaceous like the bendable stem of a daisy or woody like the trunk of an oak tree.

Adaptation to the EnvironmentAdaptation to the Environment

Stiff cell walls for trunks and branches. Dead Xylem becomes the wood on the inside

of tree trunks.

Can be modified to store food.

ex: Tubers (potatoes) and Bulbs

RootsRoots

StructureStructure

Epidermis Epidermis and root capand root cap

Root hairsRoot hairs

Root tips Root tips (apical (apical meristem)meristem)

Function Function

--protection and absorption of protection and absorption of water and minerals.water and minerals.

-increase surface area for -increase surface area for absorptionabsorption

- tip of root that is growing - tip of root that is growing into the soil into the soil (area of (area of mitosis).mitosis).

Wheat seed

Root hairs

Fragile parts of cells that grow from the main root

They massively increase the surface area for absorption

Root ‘B’ has had the hairs damaged -

Adaptation to the EnvironmentAdaptation to the Environment

1.1. Can be modified to store starch Can be modified to store starch and sugar. (Carrots, and sugar. (Carrots, Beets, Turnips)Beets, Turnips)

2.2. In dry climates root systems can be In dry climates root systems can be extremely long to reach water.extremely long to reach water.