Characteristics of living organisms
The characteristics of living organisms are: MRS GREN |
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Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion and Nutrition. |
Movement : is an action by an orgaanism causing a change of position or place. |
Respiration: Describes the chemical reactions in cells that break down the nutrient molecules and release energy. |
Sensitivity: is the ability to detect and respond to changes in the environment. |
Growth: is a permanent increase in size. |
Reproduction: is the process of producing young ones of the same species. |
Excretion: is the removal toxic materials from our body. |
Nutrition: is taking in of materials for energy, growth and developement. |
Characteristics of living organisms
The Animal kingdom: Verterbrates and Invertebrates. |
(Invertebrates) Coelenterates, Flatworms, Annelids, Molluscs, Athropods, Crustaceans, Insects, Arachnids, Myriapods |
(Vertebrates) Fish, Amphibians, Reptiles, Birds, Mammals. |
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Movement in and out of cells.
DIffusion: Is the net movement of molecultes and ions from a region of higher concentration to a region of lower concentration down the concentration gradient. |
Osmosis: is the net movement of water molecules and ions from a region of higher water potential to a region of lower water potential, through a partially permeablle membrane. |
Active transport: is the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration against the concentration gradient. |
Characteristics of living organisms
Plant Kingdom: |
Algae, Bryophytes, Ferns, Conifers, Flowering plants, |
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