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BS 1 tm 3
BS 1 tm 3
1 / 10
volgende
Slide 1:
Tekstslide
Biologie
Middelbare school
vwo
Leerjaar 1
In deze les zitten
10 slides
, met
interactieve quizzen
en
tekstslides
.
Lesduur is:
45 min
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Onderdelen in deze les
BS 1 tm 3
Slide 1 - Tekstslide
Learning goals
bs 1 and 2
you must be able to name the parts of a flower and its
features
and
functions.
you must be able to describe what pollination is.
And you must be able to tell the difference between cross-pollination and self-pollination.
you must be able to list the features of insect-pollinated flowers and wind-pollinated flowers.
Slide 2 - Tekstslide
Slide 3 - Tekstslide
Flowers
Corolla
= petals
Often big and colorful.
Why is this useful for the flower?
Calyx
= sepals
Usually green.
Why is this color useful for the flower?
Slide 4 - Tekstslide
Photosynthesis
Green parts of a plant
can do photosynthesis = make their own food out of sunlight, so they can grow!
Slide 5 - Tekstslide
Pollination - read carefully!
Self-pollination
Cross-pollination
No pollination
When pollen on the anther of a flower reaches the stigma of a flower on the same plant
When pollen from one plant reaches the stigma of a flower on another plant
When pollen of one species (=soort) reaches the stigma of a flower of another species
Slide 6 - Sleepvraag
Self-pollination
Cross-pollination
No pollination
Number 1
Number 2
Number 3
Number 4
Number 5
Number 6
Number 7
Number 8
Slide 7 - Sleepvraag
Insect-pollinated flowers
Wind-pollinated flowers
The petals are colored
The petals are small and green
The flowers have nectar and are scented
The flowers don't have nectar
Pollen sacs are outside the flower
Pollen sacs are inside the flower
Stigma is usually inside the flower
Stigma is usually outside the flower
Stigma are feathery
pollen grains are rough and sticky
Pollen grains are smooth and light
Slide 8 - Sleepvraag
Fertilization
Fertilization is the moment that the nucleus of the pollen grain and the nucleus of the egg cell fuse (=versmelten)
Slide 9 - Tekstslide
Slide 10 - Tekstslide
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