Variety Of Living Organism and Cell Structure And Level Of Organisation Flashcards
Difference between prokaryotic and eukaryotic
Prokaryotic:
Nucleus absent
Circular chromosome of dna
Unicellular
Eukorytic:Nucleus present
More than one chromosome
Unicellular or multicellular
What are 8 characteristics of living organism
Respiration
Growth
Nutrition
Excertion
Movment
Control
Reproduction
Sensitivity
Respiration
Chemical breakdown of food to release energy
Movment
Ability to change position or place
Sensitivity
The ability to detect and respond to change in environment
Excretion
Getting rid of metabolic wastes
Growth
A permant increase in size
Nutrition
Intake of food for energy
Control
Maintain balanced internal environment
Reproduction
Produce an offspring
Function of mitochondria
Site of aerobic respiration (synthesis of atp)
Cytoplasm
Jelly like material where chemical reactor occur
Cell membrane
Controls movment of substances in and out cell
Ribosome
Synthesis of protein
Permant vaccuole
Filled cell sap store dissolved sugar,mineral ions
Cellwall
Tough material help plant cell to keep turgid
Chloroplast
Synthesis of photosynthesis and has chlorophyll that trap light
Nucleus
Has dna that carry genetic information and control cell activities like protein synthesis and cell division
Rough endoplasmic reticulum
Essitienal compoment of synthesis and transport of protien
Characteristics of plant cell
1.multicelluar organism
2. Store carbohydrates as starch
3.cell wall made of cellulose
4.chloropast (site of photosynthesis)
5.large vaccuole
6.irregular in shape
Characteristics of animals
1.Multicellular organism
2.no chloroplast (cannot carry out photosynthesis
3.no cell wall
4.store carbohydrates as glycogen
5.small vaccuole
6.regular in shape
Characteristics of fungi
1.chitin cell wall
2.organised into mycelium made from thread like structure (hyphae)
3.feed by extracellular secretion of digestive enzymes and produce organic products
4.store carbohydrates as glycogen
Cannot carry out photosynthesis
5.some single celled like yeast
What meant by saptrophic nutrition
Feed by extracellular secretion of digestive enzyme and produce organic product
Characteristics of bacteria
1.single celled micro organism
2.cell wall made of murien
3.nucleus absent,contain chromosome of dna
4.cell membrane,cytoplasm,plasmid,capsule,fllagelum
5.some bacteria can carry out photosynthesis but most feed on living organism
Example of bacteria disease and what it cause and describe it
Pneumoccus cause pneumonia and its spherical bacteria act as pathogen
Describe lactobacillus bulgaricus and what is usage
Its rod shaped bacteria product yogurt from milk
Definition of organelle
Part of cell with specific function
Cells
Structural and functional unit of living organism
Tissues
Group cells with similar structure work together
Organ
Group of different tissues work together to preform specific function
Organ system
Group of organs with related functions work together to preform body function
Levels of organisation
Organelle then cell then tissue then organ then organ system then organism
What is meant by pathogen
Organism causes a disease (bacteria,virus,fungi,protoctists)
Characteristics of virus
1.non living organism
2.reproduce inside host cell
3.dont grow,excrete, move, eat
4.smaller than bacteria
5.no cellular structure but protein coat,one type of nuclic acid dna or rna
6.parastic (infect any type of organism)
Examples of virus and what it cause
Tobacco mosaic cause discolour leaves
Infleunza cause flu
Hiv cause aids
Characteristics 0f protoctists
1.single celled organism
2.plant cell structure like amoeba
3.animal cell structure like amoeba
