Igcse-biology-2017.blogspot.com Website Review

1.1: understand that living organisms share the following characteristics: all living organisms will control their internal conditions. 1.2: describe the common features shared by organisms: plants, an*mals, fungi and protoctists. organised into a mycelium : thread-like structure called hyphae, which contains many nuclei they feed by extracellular secretion : releases digestive enzymes onto food and absorb organic products ( saprotrophic nutrition )                            plants: chlorella. 1.3: describe the common features shown by prokaryotic organisms such as bacteria. bacteria: microscopic organisms that commonly causes diseases lack in nuclei’s so has circular chromosomes of dna called plasmids lactobacillus bulgaricus (yoghurt production), a rod shaped bacterium pnemococcus (causes pneumonia), a spherical bacterium that acts as the pathogen. 1.4: understand the term pathogen and know that pathogens may include fungi, bacteria, protoctists or viruses. organised into a mycelium : thread-like structure called hyphae, which contains many nuclei they feed by extracellular secretion : releases digestive enzymes onto food and absorb organic products ( saprotrophic nutrition ) lack in nuclei’s so has circular chromosomes of dna called plasmids                            plants: chlorella                            plants: chlorella. 2.1: describe the levels of organisation in organisms: organelles, cells, tissues, organs and systems. basic functional and structural units in a living organism made from different tissues carrying out a particular function. 2.2: describe cell structures, including the nucleus, cytoplasm, cell membrane, cell wall, mitochondria, chloroplast, ribosome and vacuole. semi-partially permeable membrane surrounding cytoplasm of cell a membrane of the cell that forms external to the cell membrane which is made from cellulose