Variety of living organisms
- Created by: Will.I.am J Bentley
- Created on: 02-03-16 19:43
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- Variety of living organisms
- Plants
- Multicellular organisms
- Contain chloroplasts and carry out photosynthesis
- Cells have cellulose cell walls
- Store carbohydrates as starch or sucrose
- Have a permanent vacuole
- Animals
- Multicellular organisms
- Their cells do not contain cellulose and cannot carry about photosythesis
- Don't have cell walls
- Have nervous coordination and can move from one place to another
- Often store carbohydrates as glycogen
- Have cytoplasm
- These include mammals and insects
- Fungi
- Cannot carry out photosynthesis
- Body is usually organised into a mycelium made from thread-like structures called hyphae
- Hyphae contain many nuclei
- Some are single-celled
- Cell walls are made of chitin
- Feed by extracellular secretion of digestive enzymes onto food material and absorption of organic products
- Saprotrophic nutrition
- May store carbohydrates as glycogen
- Have mitochondria
- Cell membrane
- Riibosome
- Mucor has the typical fungal hyphal structure, yeast (single-celled)
- Bacteria
- Microscopic single-celled organisms
- Have a cell wall, cell membrane, cytoplasm and plasmids
- Lack a nucleus but contain a circular chromosome of DNA
- Some can carry out photosynthesis but most feed off other living or dead organisms
- Lactobacillus bulgarcis, a rod shaped bacterium used in producing yoghurt from milk
- Pneumococcus, a spherical bacterium which acts as the pathogen causing pneumonia
- Protoctists
- Microscopic single-celled organisms
- Some, like Amoeba, live in pond water: have animal features
- Others, like Chlorella , have chloroplasts and are more like plants
- A pathogenic example is Plasmodium, responsible for causing malaria
- Pathogens are microorganisms which can cause diseases
- Viruses
- Small particles, smaller than bacteria
- Parasitic and can reproduce only inside living cells
- Infect every type of living organism
- Wide variety of shapes and sizes
- Have no cellular structure but have a protein coat and contain one type of nucleic acid, either DNA or RNA
- The tobacco virus which causes discolouration of tobacco plants by preventing formation of chlorplasts
- Influenza virus which causes the flu
- HIV virus which causes AIDs
- Plants
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