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Q. Show the Anatomical Evidence?
Anatomy is the study of the structure, organisation and development of cells and tissues of plants and animals. For over a century taxonomists have used comparative plant anatomy as an aid in classification. The anatomical features of stems and roots are important in separating Gymnosperms from angiosperms and monocotyledons from dicotyledons. In monocot stem the vascular bundles are scattered throughout the parenchyma, whereas in dicot stem the vascular bundles are more orderly and form a definite concentric ring. In some dicots vascular cambium will form between the bundles eventually connecting throughout and forming a solid ring of conducting tissue.
Progressive series from tracheids commonly found in the gymnosperms to specialised vessel elements occur in the secondary xylem of angiosperms. All stages of specialisation from vessels wood to highly specialised vessel elements are found in contemporary flowering plants. Angiosperms with vessels wood are regarded as primitive.
The presence and structure of trichomes as well as their distribution patterns among taxa are taxonomically important. Variation pattern of trichomes also provides characters for classification. Stornatal types are of taxonomic use. Stomata of dicotyledonous plants have kidney shaped guard cells and stomata of monocotyledonous plants have dumbell shaped guard cells.
In animals the study of anatomical parts provide enough describable characters and classification based on them lead to certain conclusions as has been shown to be true for hard parts as against skin in a test case for lower taxa among mammals. A first step is to extend anatomical data beyond those traditional forms of museum specimens in mammals to the baculeum, to the ear ossicles and then to the soft parts and the second step is to push anatomical observation to deeper levels to cytology and especially karyology.
Factors Controlling Stomatal Aperture 'Khul Ja Sim Sim' the two rocks slide and the gates to a great treasure open. With these magic words "Ali Baba and Chalis Chor" could ope
Pyramid of Energy - Ecological Pyramids When we wish to compare the functional roles of the trophic levels in an ecosystem, an energy pyramid is probably the most informative.
What is metagenesis? What are the other names of this process? Metagenesis is the type of life cycle in which there are two dissimilar forms of individuals of the same species,
If a fragment of nucleic acid has a nucleotide sequence TAC can one assert that it is a codon or an anticodon? A nucleic acid having a TAC sequence surely is not tRNA, it is DN
Define Food Safety and Regulation? Food sanitation because related to public health and food plant processing; FDA and USDA rules and regulations; food ingredient labelling; nu
Temperate deciduous forest - Ecosystem The temperate forests are characterised by a moderate climate and broad-leafed deciduous trees, which shed their leaves in fall, are bar
What are the Amylase Inhibitors? Inhibitors of the enzyme a-amylase are found in wheat, rye, beans, mango, legumes, potatoes, sorghum (jowar) and oats. Most amylase inhibitors
which system give the signals to salivary gland
Q. What are the major characteristics of the bryophytes? Bryophytes are nonvascular plants that is they do not have conductive tissues and they perform transport of nutrients a
Explain Foaming Properties of proteins To understand the foaming properties of proteins, we need to know some basic aspects of foam foods. Foam foods are usually colloidal disp
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