nature and variety of living organsisms Flashcards
describe common features shown by plant cells
multicellular organisms
contain chloroplast so they can photosynthesise
cell walls made of cellulose
store carbohydrates as sucrose or starch
examples of plants
cereal - e.g. maize
herbaceous legume - e.g. peas
describe the common features shown by animal cells
multicellular organisms
dont contain chloroplasts so dont photosynthesise
no cell walls
most have nervous co-ordination so are able to move from one place to another
store carbohydrates as glycogen
examples of animals
mammals e.g. humans
insects e.g. mosquito
describe common features shown by fungi
- don’t carry out photosynthesis
- some are single celled, others are organised into a mycelium made from hyphae containing many nuclei
- cell walls made of chitin
- most feed by saprotrophic nutrition
- store carbohydrates as glucose
examples of fungi
mucor , yeast
describe common features shown by protoctists
microscopic single celled organisms
some have chloroplasts similar to plants, others have features like animal cells
describe common features of bacteria
microscopic single celled organisms
some photosynthesise
no nucleus but circular chromosome of DNA
most feed off of other organisms
have a cell wall, membrane, cytoplasm, plasmid
examples of bacteria
lactobacillus bulgaricus and pneumococcus
doctrine the common functions of virus’s
comes in many shapes and sizes
particles not cells - smaller than bacteria
can only reproduce inside living cells- depend on other organisms to reproduce and stay alive
infect all types of living organisms
don’t have a cellular structure
examples of virus’s
tobacco mosaic
what is a pathogen?
organisms that cause disease including fungi, protoctists, bacteria and viruses
