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

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Gateway to the Microcosmos

Royal mallow

pollen

Marigold

pollen

1 2 3 4

6 7

Pollen comes in all shapes and sizes:

1. acacia; 2. cuckooflower; 3. maple tree;

4. oak tree, 5. dead-nettles, 6. beech tree;

7. chrysanthemum; 8 fir tree; 9. grass;

10. spruce; 11. dandelion; 12. hazel;

13. sunflower; 14. cow parsley; 15. pine tree;

16. buttercup; 17. heather; 18. apple tree.

Pollen

All seed-forming plants produce

pollen. It is a powdery substance that

plays a critical role in the plant

reproduction process. Pollen consists of

many tiny components called pollen

grains. They are usually 10–100 µm

(micrometers) in size — that is 0.01–

0.1 mm. Their shapes and surface

structures can be very different from

one another. The round, prickly pollen

of a sunﬂower, for example, looks

completely different from the air-sac-

outﬁtted pollen grain of a pine tree or

the smooth, small pollen grain of a

grass plant.

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