Define a taxon. Give some examples of taxa at different hierarchical levels.
Each unit or category of classification is termed as a taxon. It represents a rank. For example, the basic level of classification is species, followed by genus, family, order, class, phylum or division, in ascending order. The highest level of classification is known as kingdom. So each of these categories can be called as a taxon.
Phylum/Division | Class | Order | Family | Genus | Species |
1. Seed Plant | Flowering Plant | Yeast | Orchid | Citrus | Banyan |
2. Green Alga | Fern | Mushroom | Grass | Eucalyptus | Neem |
3. Flatworm | Insect | Spider | Bear | Crow | Tiger |
4. Roundworm | Bird | Lizard | Elephant | Wolf | Dog |
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell.
Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.
Bile juice contains no digestive enzymes, yet it is important for digestion. Why?
What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.
taxonomy is only unit of classification in the fact represent rank and a commonly termed as taxon
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Q. Give a comparative account of limbs of arthropods vis-a-vis those of tetrapoda.
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