plants lesson 7-8

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 1

Have ready

- Classroom

- your homework (uploaded)

- your notes

and sign up to lesson-up

HW FOR TODAY:

HOW DID IT GO?

root

stem

flower

leaf

fruit

cell wall

cell membrane

nucleus

chloroplast

cytoplasm

vacuole

mitochondria

anther

filament

petal

sepal

stigma

style

ovary

nectary

food store

radicle

plumule

skin

micropyle

Put the words in the correct order, starting with pollination. 

pollination

growth

germination

fertilization

dispersal

vein

cuticle

upper epidermiss

spongy 

layer

stomata

lower epidermis

palisade 

layer

root cap

root tip

lateral root

primary root

root hairs

The plant absorbs sunlight through the palisade cells.

The plant absorbs water and nutrients through the roothair cells.

The plant transports water and nutrients up through the xylem vessels.

The plant transports sugars and nutrients down through the phloem vessels.

The plant absorbs carbon dioxide through the stomata cells.

The plant releases oxygen through the stomata cells.

Today:

- limiting factors

- enzymes

- geotropism

- phototropism

LIMITING FACTORS:

• CARBON DIOXIDE
• WATER
• SUNLIGHT
• CORRECT TEMPRATURE FOR ENZYMES

WHAT ARE ENZYMES?

• ENZYMES ARE A CATALYST
• THEY ARE LITTLE CHEMICAL FACTORIES THAT ARE USED TO SPEED UP CHEMICAL REACTIONS
• OPTIMUM TEMPRATURE IS BETWEEN 25-40 DEGREES CELCIUS

CONTROLLING LIMITING FACTORS:

• IN FIELDS THESE ARE DIFFICULT TO CONTROL
• THIS IS WHY WE USE GREENHOUSES
• MORE CONTROL OVER ALL THE LIMITING FACTORS;
• ESPECIALLY TEMPRATURE AND WATER SUPPLY

geotropism:

• this is how gravity affects the growth of plants

• roots are positively geotropic
• plants are negatively geotropic

phototropism:

• this is how sunlight affects the growth of plants

• leaves are positively phototropic
• roots are negatively phototropic

Auxin:

• this is a plant hormone that stimulates growth in certain places of the plant.

HW FOR NEXT TIME:

- continue your mindmap

- complete all formative