Stem MICROSCOPE Bedienungsanleitung Seite 4

MICROSCOPE SLIDES
BATTERY INSTALLATION AND CHARGING
Your new microscope comes with 10 prepared microscope slides so you can start
seeing cool stuff right away. You also have blank slides and cover slips to create
your own amazing specimen samples, using the instructions below.
Here's a quick guide to things to look for in the prepared slides.
Epidermis of Allium cepa w.m.
This stained sample of an onion skin shows the plant's cells lined up in rows, with
the cell walls and cell nuclei clearly visible. Try looking at an unstained piece of onion
skin and see if the same features are visible.
Fern leaf sec.
Rather than using seeds and flowers like most other plants, ferns reproduce by means
of spores situated on the underside of the leaves. In this fern leaf section you can see
the spore-containing capsules (called sporangium) sticking up from the leaf.
Monocotyledon stem t.s. and Dicotyledon stem, t.s.
Botanists classify flowering plants into two groups: monocotyledons and
dicotyledons. One easy way to tell them apart is that the veins on the monocot
leaves tend to run straight down the length of the leaf while the veins on dicot
leaves branch. Compare a blade of grass to a lettuce leaf to see the difference.
The long tissues that transmit nutrients and water up and down the plant are
arranged into bundles. The cross-section of the monocot stem shows that these
bundles are distributed throughout the stem, with more bundles gathered at the
edges. In the dicot stem, on the other hand, the bundles form a cylinder and occur
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only at the edges of the stem. Can you spot any other differences
Pollen germ, w.m.
Pollen, part of the reproductive system of flowering plants, comes in many shapes and
sizes. The tube attached to each grain of pollen carries the genes that fertilize the flowers.
Hymenomycetes sec.
On many mushrooms the reproductive spores are arranged on gills that radiate
out from the stem of the fungus. The pattern of these gills and the shape of the
edges of the mushroom cap (wavy, straight, ragged, serrated) help botanists
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identify different species. How would you describe this sample
Aspergillus w.m.
Among the few hundred species of mold in the group Aspergillus are the common mold
you see on old bread and a variety that produces citric acid, the preservative found in
many foods. Mold fungi grow on threadlike structures called hyphae, with the reproductive
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spores clustered at the tip. Can you identify both of these on your specimen
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