Nature Of Living Organisms Flashcards
What is movment
Ability to change postion
Respiration
Chemical Breakdown of food to release energy
Sensivity
Ability to detect and respond to change in environment
Growth
Permenat increase in size
Reproduction
Produce offspring
Excertion
Get rid of metabollic wastes
Nutrition
Intake of food for energy growth and development
Difference between prokaryotic and eukaryotic
In prokaryotic nucleus absent
Unicellular
Have circular chromosome of dna and has plasmid
Eukaryotic contain nucleus
Unicellular or multicellular
More than one chromosome
Similarities between animal and plant
Both multicellular organisms
Difference between plants and animals
Plant contain chloroplasts so can carry out photosynthesis but animal don’t have
Plants contain celluose cell wall but animal don’t have cell walls
Plant store carbohydrates as starch or sucrose but animal store carbohydrates as glycogen
Characters tics of fungi
Organism cannot carry out photosynthesis
Some are single cell as yeast
Cell wall made of chitin
Body organized into mycelium made from thread like structure call hyphae
Store carbohydrates as glycogen
Charasticts of protoctists
Single celled organism
Some have features like animal cell like amoeba
Protists like chlorea have chloroplasts like plant cell
Protoctists cause —-disease responsible for causing ——
Plasmodium, malaria
Charasticts of bacteria
Cell wall made of murien
No nucleus but contain circular chromosome of dna
Have cell membrane cytoplasm plasmids,flaggelum, capsule
Some bacteria can carry out photosynthesis
Describe pneumococcus and what it cause
Spherical bacterium that act as patgegon cause pneumonia
Example of bacteria and its usauge
Lactobacillus bulgaricus rod shape bacterum use in production of yoghurt from milk
What is a pathogen and give examples
Organism causes disease
Including virus, bacteria,fungi, protoctists
Charasticts of virus
Non living organisms
Don’t respire grow feed or excrete
Smaller than bacteria
Reproduce only inside their host cell
No cellular structure but had protein coat and contain one type of nuclic acid either dna or RNA
Virus are parastic and infect any type of organism
Example of virus and what it cause
Tobacco mosaic cause discoloring leaves of tobacco plant prevent formation of chloroplasts
Influenza virus cause flu
Hiv virus cause aids
What is saprotrophic nutrition
Feed by extracellular secretion of digestive enzymes onto food mayerial and absorb of organic products
Metaboism
Chemical reaction takes place inside cell
Stimuli
Change in external or internal environment of organism such as light,heat,pain
Dry mass
Actual mass of organism after remove its water content
