Thames & Kosmos Kids First: Biology Lab (V 2.0) handleiding

Niet gecategoriseerd

Thames & Kosmos

36 pagina's

PDF beschikbaar

Handleiding

Plant Cells

Waterweed

chloroplasts

You will need

– Slide

– Cover slip

– Pipette

– Tweezers

– Blotting paper or paper towels

– Waterweed leaf

– Water

Here’s how

1. Prepare the slide as already described in the

onion skin experiment (Experiment 3).

2. Use the tweezers to place the leaf in the water

droplet, and cover everything with a cover slip.

3. Clip the slide onto the stage and observe the

waterweed leaf under the microscope. Make

sure to start at the lowest magnification.

EXPERIMENT





Most leaves consist of several layers of cells.

That is why you first have to cut these

specimens in order to get a layer thin enough

for the light of the microscope to pass through.

Before practicing your cutting technique in the

next chapter, try finding other types of

plants with similarly simple tissue

structures. Moss leaves are ideal for

this. Try peeling off thin layers from

the surface of other plant leaves, such

as cabbage or lettuce leaves (close to

the stalk); or from the stems of cut

flowers (e.g., tulips, gerber daisies); or the

skin of a tomato.



The chloroplasts get their green color from a plant

pigment inside them called chlorophyll. This also

enables the chloroplasts to perform photosynthesis, a

biological process in which sugar and starch are

produced with the help of water and sunlight. You can

see individual chloroplasts inside the plant cells under

your microscope. Due to the bright LED light in the

microscope, the chloroplasts are in constant motion.



Bekijk gratis de handleiding van Thames & Kosmos Kids First: Biology Lab (V 2.0), stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.