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Diversity In Living Organisms
You are given an assortment of plants on your laboratory table. What characters will you look for in order to label a particular specimen as : (i) Angiosperm (ii) Moss (iii) Alga.
(i) Angiosperm:
(a) Presence of flowers, seeds covered seeds and fruits.
(b) Presence of root, stem and leaves.
(c) Presence of xylem vessels.
(ii) Moss:
(a) Absence of roots.
(b) Presence of rhizoids.
(c) Leaves one cell thick.
(d) Presence of green thallus.
(iii) Alga:
(a) Green in colour.
(b) Filamentous or single celled.
(c) Food stored as starch.
(d) Aquatic.
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How would you choose between two characteristics to be used for developing a hierarchy in classification?
Explain the basis for grouping organisms into five kingdoms.
What are the major divisions in the plantae? What is the basis for these divisions?
How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
Explain how animals in vertebrata are classified into further subgroups.
Name the biggest animal and the tallest tree.
What is classification?
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.
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