Tuesday, 14 February 2012

Perkara Am Mengenai Tumbuhan



Most people do not recognize the importance of plants, when in fact plants play an influential part in our daily lives.  Plants take in carbon dioxide and give out oxygen which we breathe in.  Without plants, we would not have clean air to breathe!

Plants grow in every region of the world.  Heat, light, and water are basic essential needs for all except the simplest types of plants.  Most flowers can't thrive without pollination, one way pollination is done is by insects, mainly by bees, butterflies, and fruitflies.  Pollination is when pollen from the anther is transferred to the stigma to make seeds.

Some flowers do not need pollination to produce seeds for reproduction, their roots are designed to reproduce on their own.  There are several kinds of roots that reproduce, rhizomes, stolons, bulbs, runners, corms, and tubers.  Because of Alaska's short summers a lot of wild flowers reproduce in this way.  Rhizomes are underground stems that grow just under the surface of the soil where every so often a flower shoots up.   Alaska's blue irises reproduce this way.  A corm resembles small underground leaves wrapped around each other similar to an onion, that new corms grow from.   A bulb is similar to a corm but reproduces in the same place each year without moving.  A tuber is a big group of swollen stems that act as a storage chamber, each of which can form a new plant after the main plant has died.  A runner is sent above ground and roots grow out to anchor the new plant.   All strawberries can reproduce this way.

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