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20 Cards in this Set
- Front
- Back
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What does MRS GREN stand for? |
Movement
Respiration Sensitivity Growth Reproduction Excretion Nutrition All the characteristics of a living organism |
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Name the 5 characteristics of a plant?
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Multi-cellular, cell wall is made of glucose, Vacuole containing sap, chloroplasts for photosynthesis, carbohydrates stored as starch or sucrose
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Name the 5 characteristics of an animal?
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Multi-cellular, eat other living organisms, no cell wall or chloroplasts, can move freely, store carbohydrates as glycogen.
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What are the levels of organisations within organisms?
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Orgenalles, cells, tissues, organs and systems
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What is an organelle?
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Organised or specialised structures within a living cell
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What are tissues?
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A collection of specialised cells of a similar origin that work together to perform a function.
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What are the 5 characteristics of a fungi?
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Some are single celled, body organised into mycelium (lots of thread like hyphae containing many nuclei), cell wall is chitin and fibrous carbohydrates, use saprotrophic nutrition, store carbohydrates as glycogen
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What is saprotrophic nutrition?
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Extra cellular secretion of digestive enzymes onto food material and absorption of organic products
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What is the function of a nucleus?
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Controls cell / contains DNA
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What is the function of cytoplasm?
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Jelly like substance where all reactions take place
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What is the function of a cell membrane?
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Partially permeable / maintains cell shape
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What is the function of a cell wall?
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Made of cellulose / rigid, keeps the cell shape
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What is the function of chloroplast?
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Contains chlorophyll / where photosynthesis occurs
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What is the function of a vacuole?
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Stores cell sap, water and minerals
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What are 3 the characteristics of a protoctist?
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Microscopic, single celled. Some (amoeba) have animal like cell features. Some (chlorella) have chloroplasts like plants. Some are pathogens eg. Plasmodium causes malaria
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What is a pathogen?
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An agent causing disease or illness to its host
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What are the 8 characteristics of bacteria?
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Microscopic, single celled, cell wall/membrane, cytoplasm, no nucleus, circular chromosome of DNA, some photosynthesise, use binary fission to reproduce
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What is binary fission?
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DNA is doubled in cell, cell splits in two, form of sexual reproduction
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What are the 6 characteristics of virus?
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Smaller than bacteria, parasitic, reproduce inside living cells, no cellular structure, protein coat surrounding DNA/RNA, can infect every type of living organism
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What can pathogens be?
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Fungi, bacteria, protoctist, or viruses
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