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(a) Describe Thomson's model of the atom. Which subatomic particle was not present in Thomson's model of the atom?
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What is a megaphone ? Name the principle on which a megaphone works.
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What is a bulb horn ? Name the principle on which a bulb horn works.
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What is a stethoscope ? Name the principle on which a stethoscope works.
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What is a soundboard ? Explain the working of a soundboard with the help of a labelled diagram.
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Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.
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The first model of an atom was given by :
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The water conducting tissue generally present in gymnosperm is
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______ are forms of complex tissue.
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Xylem transports ______ and ______ from soil.
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Why are xylem and phloem called complex tissues? How are they different from one other?
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Organisms without nucleus and cell organelles belong to
- fungi
- protista
- cyano bacteria
- archae bacteria
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Fungi shows ______ mode of nutrition.
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Cell wall of fungi is made up of ______.
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Association between blue green algae and fungi is called as ______.
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Match items of column (A) with items of column (B)
| (A) | (B) | ||
| (a) | Naked seed | (A) | Angiosperms |
| (b) | Covered seed | (B) | Gymnosperms |
| (c) | Flagella | (C) | Bryophytes |
| (d) | Marchantia | (D) | Euglena |
| (e) | Marsilea | (E) | Thallophyta |
| (f) | Cladophora | (F) | Pteridophyta |
| (g) | Penicillium | (G) | Fungi |
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Fungi do not contain ______.
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A fungus ______ can be seen without microscope.
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Common fungi used in preparing the bread is ______.
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Algae and fungi form symbiotic association called ______.
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