write the distinguishing characters of Kingdom Monera Kingdom Protista and kingdom fungi
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The general characteristic features of Monerans are:
1.Monerans are present in both living and non-living environment.
2.Some have rigid cell walls, while some do not.
3.Membrane bound nucleus is absent in monerans.
4.Habitat – Monerans are found everywhere in hot or thermal springs, in the deep ocean floor, under ice, in deserts and on or inside the body of plants and animals.
5.They are autotrophic, i.e., they can synthesize food on their own while some other have a heterotrophic, saprophytic, parasitic, symbiotic, commensalistic and mutualistic modes of nutrition.
6.Locomotion is with the help of flagella.
7.Circulation is through diffusion.
8.Respiration in these organisms vary, few are obligate aerobes, while some are obligate anaerobes and facultative anaerobes
9.Reproduction is mostly asexual and few also reproduce by sexual reproduction. Sexual reproduction is by conjugation, transformation, and transduction. Asexual reproduction is by binary fission.
General characteristics of Kingdom Protista are as follows:
1.They are simple, unicellular, eukaryotic organisms.
2.Most of the protist live in water, some in moist soil or even the body of human and plants.
3.These organisms have a membrane-bound nucleus, endomembrane systems, mitochondria for cellular respiration and some have chloroplasts for photosynthesis.
4.Nuclei contain multiple DNA strands and the number of nucleotides is significantly less.
5.Respiration – cellular respiration is the primarily aerobic process, but some living in the moist soil underneath ponds or in digestive tracts of animals are facultative anaerobes.
6.Locomotion is often by flagella or cilia.
7.Nutrition- include both heterotrophic and autotrophic.
8.Reproduction – Some reproduce sexually and others asexually.
9.Some protists are pathogens of both plants and animals. Example: Plasmodium falciparum causes malaria in humans.
General characteristics of fungi are as follows:
1.Fungi are eukaryotic, non-vascular and non-motile organisms.
2.The growth rate of fungi is slower than that of bacteria.
3.The Kingdom Fungi grow best in an acidic environment.
4.The Kingdom Fungi consist of both unicellular (e.g. Yeast, Molds) and multicellular (e.g. mushrooms) organisms.
5.Like plant cells, fungi have cell walls made up of complex sugar molecules called chitin. But unlike plants, they do not undergo photosynthesis.
6.The cell wall is composed of chitin. The vegetative body of the fungi may be unicellular or composed of microscopic threads called hyphae.
7.They have a heterotrophic mode of nutrition. Few species are saprophytes i.e., they feed on dead and decaying organic matters.
8.Some fungi are parasitic while some are symbionts. They can live in a symbiotic relationship with algae like blue-green algae. These are called lichens.
9.Reproduction in fungi is both by sexual and asexual means. Asexual reproduction takes place by means of spores and sexual reproduction takes place by means of gametic copulation, somatic copulation, and Spermatization.
Monera (Monos – single) includes prokaryotes and shows the following characters:
They are typically unicellular organisms (but one group is mycelial). The genetic material in these organisms is the naked circular DNA. A nuclear envelope is absent. Both, ribosomes and simple chromatophores, are the only subcellular organelles in the cytoplasm.Sap vacuoles do not occur. Instead, gas vacuole may be present. The predominant mode of nutrition is absorptive but some groups are photosynthetic (holophytic) and chemosynthetic.The organisms are non-motile or move by the beating of simple flagella or by gliding.