Classification refers to the orderly arrangement of organisms, based on their similarities and differences. The process of classifying plants had been practiced even in the ancient times. The main classification systems used in plants were: Artificial Classification: It is the first and the oldest system of plant classification. It was based on one or a … Read more
Viruses are organisms that lie at the boundary between living and non- living organisms. They are non-cellular organisms and have an inert crystalline structure outside a living cell. Once a virus infects a host cell, they will become alive and takes over the host cell machinery to divide themselves. They are thus obligate parasites. The … Read more
Viruses are organisms that lie at the boundary between living and non- living organisms. They are non-cellular organisms and have an inert crystalline structure outside a living cell. Once a virus infects a host cell, they will become alive and takes over the host cell machinery to divide themselves. They are thus obligate parasites. The … Read more
Kingdom Plantae contains all plant species: mosses, ferns, algae, conifers and flowering plants. All the members are chlorophyll containing eukaryotes. The plant cells have a eukaryotic structure with prominent chloroplasts and cell wall mainly made of cellulose. Plants : Nutrition Majority of the plants are photoautotrophic. Using chlorophyll, they will capture light energy, which is … Read more
All unicellular eukaryote were placed under the Kingdon Protista. Most of them live in aquatic habitats. Since they are eukaryotes, the cells have a distinct nucleus and membrane bound cell organelles. Motile protists possess either flagella or cilia. Reproduction involves both sexual and asexual methods. Protista: Classification Chrysophytes Diatoms and Golden algae are the sole … Read more
All unicellular eukaryote were placed under the Kingdon Protista. Most of them live in aquatic habitats. Since they are eukaryotes, the cells have a distinct nucleus and membrane bound cell organelles. Motile protists possess either flagella or cilia. Reproduction involves both sexual and asexual methods. Protista: Classification Chrysophytes Diatoms and Golden algae are the sole … Read more
VIROIDS Viroids are small infectious agents, composed of a single- stranded circular RNA without a capsid. It was discovered by T. O. Diener in 1971. It differs from viruses only in that it lacks a capsid, and hence the name viroid. The viroid RNA does not code for any gene, hence they cannot replicate themselves. … Read more
Kingdom Fungi contains some of the most ecologically and economically important organisms. They decompose dead organic matter, and release the essential nutrients back to soil. This ensures the continuity of nutrient cycles in an ecosystem. They form symbiotic associations with plants, and provide them with essential nutrients. Some fungi are used for the production of … Read more
Kingdom monera consists of prokaryotic organisms. Bacteria are the sole members of this group. They constitute the most abundant and microorganisms on earth. Even a single gram of soil contains nearly 40 million bacterial cells. They are found anywhere and everywhere. They can exist even in extreme conditions, where no other organism can survive. They … Read more
Classification is the process of process of grouping organisms into different categories based on easily observable characters. The earliest classification was done by Aristotle. He used simple morphological characters to classify organisms. He grouped plants into trees, shrubs and herbs. Animals were divided into two groups, animals which have blood and do not have blood. … Read more