Variety of living organisms Flashcards
Prokaryote
They do not have a true nucleus
They do not have membrane bound organelles
Eukaryote
They have a nucleus
They have membrane bound organelles
Prokaryote
Bacteria
Eukaryote
Protista
Fungi
Plant
Animal
5 kingdoms
Bacteria
Protista
Fungi
Plant
Animal
Unicellular or multicellular: plants
Multicellular
Their cells contain chloroplast: plants
It does
Feed: plants
By photosynthesis
Unicellular or multicellular: animal
Multicellular
Their cells contain chloroplast: animal
Do not contain chloroplast
Has nervous coordination: animal
They have
carry out photosynthesis: animals
Are not able to carry photosynthesis
Cell wall: animals
They have no cell wall
Able to move from one place to another: animals
They are able to
Stores carbohydrates as: animals
Glycogen
carry out photosynthesis: plants
they are able to carry out photosynthesis
Cell wall is made up of: plants
Cellulose
Stores carbohydrates as: plants
Sucrose or starch
Has nervous coordination: plants
Does not
Protista (protoctists) (4)
These are microscopic single-celled organisms
Some like amoeba are like animal cells
While some like chlorella have chloroplast and so are more like plants
A pathogenic example is plasmodium which causes malaria
Fungi (unicellular or multicellular)
Unicellular like yeast
Multicellular like mould
Fungi cell
Mitochondria
Cytoplasm
Nucleus
Vacuole
Cell memberane
cell wall
Fungi (11)
They are not able to carry out photosynthesis
Their cells do not contain chloroplast
They feed by saprotrophic nutrition
(Multicellular) Their body is usually organized into a mycelium made from thread like structures called hyphae
Some fungi are parasitic and feed on living organisms
Their cells have a cell wall made of chitin
They feed on extracellula secretions of
digestive enzymes onto food materials and absorption of the organic products this is known as saprotrophic nutrition
Some fungi store carbohydrates as glycogen
Examples like mucor which has the typical hyphal structure
And yeast is single-celled
They are usually multicellular but some are single-celled
Their cells contain a nucleus with a distinct membrane
carry out photosynthesis: fungi
They are not able to
Their cells contain chloroplast: fungi
Do not contain chloroplast
Feed by: fungi
Saprotrophic nutrition
Saprotrophic nutrition
Hyphae secretes digestive enzymes onto the food
Enzymes breakdown food into soluble substances like sugar
Mould absorbs the digested products
Viruses and their causes: influenza
Causes flu
Viruses and their causes: HIV virus
Causes AIDS
Viruses and their causes: Tobacco mosaic virus
Causes discolouring of the leaves of tobacco plants preventing the formation of chloroplast
Pathogens
Is any microorganism that causes disease in another organism (in plants or animals)
Pathogens examples
Fungi
Bacteria
Protoctists
Viruses
Living organisms or non living: viruses
are not living organisms
Smaller or larger than bacteria: viruses
smaller
Are parasitic or not parasitic
Are parasitic
MRS GREN: viruses
Can only reproduce inside living cells
Viruses infect
Every type of organism
Reproduction in viruses
Examples of viruses
Tobacco mosaic virus
Influenza virus
HIV virus
Viruses don’t have
A nucleus or cytoplasm
Structure of virus: genetic material DNA or RNA
The genetic material can be either DNA or RNA having genes enough just to reproduce in host cell
Structure of virus: protein coat
Used for protection of genetic material
Envelope
It is a ‘stolen cell membrane’ from host cell. Viruses do not make this nor do all viruses have this too
Bacterium
They are microscopic single-celled organisms
Structure of bacteria
Nucleoid (DNA)
Plasmids
Cytoplasm
Capsule
Cell wall
Flagellum
Plasma membrane
Structure of bacteria: cell wall
Gives protection to the cell and keeps the shape of the cell.
It is made up of peptidoglycan
Structure of bacteria: plasma membrane
Controls the movement of substances in and out of cells
Structure of bacteria: Capsule
Gives extra protection for some bacteria
Structure of bacteria: Cytoplasm
Site where chemical reactions take place
Structure of bacteria: Nucleoid (DNA)
No true nucleus but DNA lies loosely in the cytoplasm
Structure of bacteria: plasmids
Small circular rings of DNA carrying some bacterial genes
Structure of bacteria: flagellum
Present only in moving bacteria which helps bacteria to move through water by rotating it
Nutrition in bacteria
Feed on other living or dead organisms- decomposes
Carry out photosynthesis
Examples of bacteria:
Lactobacillus
Pneumococcus
Lactobacillus
Used in production of yogurt from milk
Pneumococcus
Is a pathogen causing pneumonia