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.
Briefly mention the mechanism of action of FSH.
Discuss the main steps in the digestion of proteins as the food passes through different parts of the alimentary canal.
Mention the ploidy of the following:
protonemal cell of a moss;
primary endosperm nucleus in dicot,
leaf cell of a moss;
prothallus cell of a fern;
gemma cell in Marchantia;
meristem cell of monocot,
ovum of a liverwort, and
zygote of a fern.
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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