Posts

Botany Videos

Systems of Plants Classification

-
Image
What is Classification The process of arrangement of plants into distinct categories on the basis of desired characteristics is called as Classification. It is basically the sorting of plant kingdom into groups that share some characteristics ARTIFICIAL SYSTEM: According to this system plant can be classified on the basis of easily observable characters like habit and floral characters. Example Linnaeus classification also known as SEXUAL Selection is an Artificial System of Classification. NATURAL SYSTEM This system of classification is based on such relationship between plants that might be naturally found. Classification of plants on the bases of related affinities. Classification of plants on basis of morphological characters just like are naturally present in environment. Example : Bentham and Hooker PHYLOGENETIC SYSTEM Classification of plants on the basis of their evolutionary history using fossil records. For this most accurate phylogenetic tree was selected A phylogenetic tree...
Post a Comment
Read more

Botanical Nomenclature- Rules and Principles - International Code of Botanical Nomenclature and its History

-
Image
The determination of correct name of a taxon is called as Nomenclature Botanical Nomenclature is a part of Plant Systematics that deals with giving correct names to a taxon according to set of rules The naming should be in accordance with Internation Code of Botanical Nomenclature. ICBN governs the activity of Botanical Nomenclature. How the concept of Botanical Nomenclature Started/ History Initially long names were used for naming purpose, but as they were difficult to use. Casper Bauhin was the one who initially started the concept of Binomial Nomenclature that turned to be most suitable for naming plants. But he did not use it for all species that was its drawback. Carlous Linnaeus was than established Binomial Nomenclature and Set its rules. Linnaeus establish Binomial Nomenclature in his book Species Plantarum and Published rules in Critica botanica. Alphonse de Candolle gave a uniform Botanical Nomenclature for naming plant in his manuscript Lois de la nomenclature botanique. ...
Post a Comment
Read more

Leishmania Life Cycle Animal Parasitology Microbiology and Pathology

-
Image
 Basics about Life Cycle Leishmania donovani , is a digenetic protozoan parasite. The life cycle completes in two hosts: the primary host is human, and the secondary host (vector) is sand-fly. It causes Indian kala azar. The flagellates belonging to Leishmania genus causes zoonotic disease called Leishmaniasis. The protozoan parasite occurs in two morphologically discrete forms: (a) Amastigote form and (b) Promastigote form. DIFFERENCE BETWEEN AMISTIGOTE and PROMASTIGOTE FORM of Leishmania: Disease life Cycle is as Follows: For Complete Explanation video watch the below video link:
Post a Comment
Read more

Plant Evolution and History: Rhyniophytes- notes with diagrams- Earliest Angiosperms -google

-
Image
  Rhyniophytes Rhyniophytes are the earliest vascular plant but now extinct group. In Devonian period but no fossil appears after Devonian Period. Morphological features: They Lacks Roots but have Rhizome (Underground stem) with unicellular Rhizoids.(Similar to Ferns) Have a central column of xylem running through its stems, but no true tracheid cells. Have Aerial Sporangia. (Similar to Mosses) Have Dichotomous Branching.
Post a Comment
Read more

Plants History and Major Plant forms (Vascular and Non-Vascular Plants) with easy notes.

-
Image
Plants: Include Land Plants as well as Aquatic plants but Plant kingdom comprises Land Plants. Land Plants are MONOPHYLETIC in Origin and forms 10 Major Groups. Land Plants are categorized into Non-Vascular and Vascular Plants. Non-Vascular includes LIVERWORTS HORNWORTS and MOSSES. Vascular Plants include seven major forms: VASCULAR LAND PLANTS                                                                                         1.Lycopodiophyta : (Club mosses) Having Microphylls in spirals and sporangia in leaf axils 2. Monilophyta: (Horsetails and ferns) Having Megaphylls.                                                       ...
Post a Comment
Read more

What is Radioactivity/ What is Radioisotope? Radioactive Dating.

-
Image
What is Radioactivity? Radioactivity refers to the natural occurrence of certain unstable atomic nuclei that undergo decay to achieve stability. This decay process involves the transformation of one element into another. Here Decay means change in form like conversion of an Unstable Radioactive atom to a stable atom. Radioactivity can also be defined as the decay of Parent atom to a stable daughter radioisotope atom. What is a Radioisotope? A Radioisotope is a Radioactive Isotope. Radioactive means it has Unstable nuclei, Emit radiation, Have different half-lives. An isotope is an element that has the same number of protons (and thus the same atomic number) but a different number of neutrons in its nucleus.  Examples of Radioisotopes Decay of Unstable Radioisotope nuclei to Stable products Radioactive Isotopes can be used to date a past event or to find the age of an old material. By Estimating the concentration of radioisotope in a living thing, dating can be performed. For Ex...
Post a Comment
Read more