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Diversity In Living Organisms
What are angiosperms?
Angiosperms. These are plants with covered seeds (seeds enclosed in fruits). These are the highest forms of plants. All are flower, seed and fruit bearing.
i. The seeds develop inside an organ which is modifies to become fruit.
ii. They bear flowers.
iii. Plants embryos have cotyledons which are known as seed leaves.
iv. Two big groups of angiosperms are included in this. They are:
(i) Dicotyledons (embryo of the seed bears two cotyledons) e.g., Pea, Gram, Mustard etc.
(ii) Monocotyledons (embryo of the seed bears single cotyledon) e.g., Wheat, Maize, Paphiopedilum etc.
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Name the branch of science which deals with classification.
Why do we classify organisms?
Give three examples of the range of variations that you see in life form around you.
What was the basis of animal classification done by Aristotle.
Why a method of classification of animals proposed by Aristotle was not accepted ? Explain with example.
What do you mean by ‘characteristics’? Explain with example.
How hierarchy of classification be built?
Which do you think is a more basic
characteristic for classifying
organisms?
(a) the place where they live.
(b) the kind of cells they are
made of. Why?
What is the primary characteristic on which the first division of organism is made?
On what basis are plants and animals put into different categories?
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