LM 1a & 1b characteristics of living organisms Flashcards
what does MRS GREN stand for?
Movement Respiration Sensitivity Growth Reproduction Excretion Nutrition
what is movement?
An action by an organism or part of an organism causing a change of position or place
what is respiration?
A process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide, and using glucose from digested food
what is sensitivity?
The ability to detect changes in the environment
what is growth?
A permanent increase in size of a body part or the organism
what is reproduction
Capacity of organisms to give rise to a new organism similar to themselves
(asexually or sexually)
what is nutrition
a process by which chemical substances (nutrients) are acquired from the environment and used in cellular activities.
what is excretion
Process of removing wastes from the body.
what are the five kingdoms?
animals plants fungi bacteria protoctista
what are characteristics of animals?
- don’t carry out photosynthesis
- multicellular
- heterotrophs (don’t make their own food)
- store carbs as glycogen
- no cell walls
what are characteristics of plants?
- carry out photosynthesis
- some are multicellular- autotrophs (make their own food)
- store carbs as sucrose or starch
- have cellulose cell walls
what are characteristics of fungi?
- have cell walls (chitin), no chloroplasts
- decomposers (get their food from decaying matter)
- store carbs as glycogen
- have nuclei
- can be multi or uni-cellular
what are characteristics of bacteria?
- unicellular
- feed off other organisms
- no nucleus
- have cell wall
what are characteristics of protoctists?
- unicellular
- have nuclei
what is a virus cell?
- they are parasitic, can only reproduce inside living cells
- have no cellular structure
- have a protein coat
what is a pathogen?
an organism causing disease to its host, examples are bacteria, fungi, viruses or protists
what is an example of fungi?
Mucor
- mushrooms, toadstools, and moulds are multicellular
yeast is a single celled fungi
what is an example of prokaryotes?
bacteria
what is an example of protoctists?
amoeba (animal like cell)
chlorella (plant like cell)
example of virus?
influenza virus that causes flu
what is a virus that effects plants?
tobacco mosaic virus
- makes the leaves of a tobacco plant discoloured by stopping them from producing chloroplasts
what do animals have that all the others don’t?
some kind of nervous co-ordination
- respond rapidly to their environment
what is the fungi structure like?
mycelium made from thread-like structures called hyphae
what is a bacteria example?
pneumococcus, pathogen causing pneumonia
