characteristics of living organisms Flashcards
Characteristics of living organisms:
MRS GRENH
Movement
Respiration
Sensitivity
Growth
Reproduction
Excretion
Nutrition
Homeostasis
Movement:
When an organism changes position or place
Respiration:
To release/produce energy aerobically or anaerobically
Sensitivity:
Detects stimuli and responds to them
Growth:
To increase in size/ mass
Reproduction:
Can have offspring either sexually or asexually
Excretion:
To remove toxic waste that is produced in the body
Nutrition:
Can absorb nutrients in order to use them for growth/ repair
Levels of organisations in organisms:
organelles
cells
tissues
organs
organ system
organelles
A component inside a cell that carries out a particular task
cells
basic functional unit of living organisms
tissue
a collection of similar cells, carrying out a particular function within an organ
organ
A collection of different tissues that work together to perform a common function
organ system
groups of organs working together to perform an overall function for the organism
Cell structure in animal cells:
Nucleus
Cytoplasm
Ribosomes
Cell membrane
Mitochondria
Nucleus:
Contains genetic material, controls activity in cell
Cell Membrane:
Controls what comes in and out of the cell.
Contains receptor molecules
Cytoplasm:
-Jell-like substance where chemical reaction occurs.
- Contains enzymes and proteins. Organelles are found in it
Mitochondria:
Where aerobic respiration occurs
Ribosomes:
Where protein synthesis occurs
Structures in plant cells:
-Cell wall
-Nucleus
-Vacuole
-Cytoplasm
-Chloroplasts
-Cell Membrane
-Mitochondria
-Ribosomes
Vacuole:
-Stores cell sap
Improves cell’s rigidity
Chloroplasts:
Contain chlorophyll pigments that absorb light from the sun
Cell Wall
Provide strength to the cell
Made out of cellloluse
Excretion vs Egestion
- Excretion is removal of toxic waste, waste metabolism and excess substances
- Egestion is passing out of undigested food
Organelles FOUND IN PLANTS NOT IN ANIMALS (3)
- Chloroplasts
- Cell Wall
- Vacuole
