the model of cells Flashcards
what type of cells are there
animal cell and plant cell
what is a cell
the basic unit of life
what parts do plant cells have
- cytoplasm
- cell membrane
- nucleus
- vacuole
- cell wall
- chloroplast(leaf cell)
what parts do animal cells have
- cytoplasm
- cell membrane
- nucleus
- vacuole
what is a cytoplasm and what are its functions
- jelly-like substance that fills a cell
- site where most chemical reaction takes place
what is a cell membrane and what are its functions
- Thin outer layer that surrounds a cell
- Selectively (partially) permeable
- Controls movement of substances into and out of cell
what is a nucleus and what are its functions
- Contains DNA
- Will cause the cell to die if removed.
- it is the control centre of the cell
- Centre that controls all activities that occur within a cell
what is a vacuole and what are its functions
- Space within a cell
- Stores liquids, food and waste materials
what is a cell wall and what are its functions
- Tough outer covering surrounding the cell membrane
- fully permeable: allows substances to move through freely
- Protect and supports the entire cell
- Rigid and gives the cell a regular shape
what is a chloroplast and what are its functions
- Contains chlorophyll to trap light energy (food factory)
- Allows photosynthesis takes place
do all plant cells have chloroplast
no
do root cells contain chloroplast
no
do leaf cells contain chloroplast
yes
what are some examples of uni-cellular organisms
- bacteria
- amoeba
- euglena
- paramecium
what is a unicellular organism
- Consists of a single cell
- All life processes takes place within the unicellular organism
what is a multicellular organism
- Made of many similar cells or more than one type of cell
- Different cells are specialized to efficiently carry out own function
- Different of cells are dependent on others
what is division of labour and why is it important
- The organisation of cells in a multicellular organism allows different parts of an organism to perform different functions in a coordinated way
- Ensures smooth and efficient functioning of the multi-cellular organism and its survival
- Enables different functions to be carried out at the same time
describe and explain division of labour in a multicellular organism
a tissue is formed by cells that perform same function. a organ is formed by tissues that perform different functions. a system is formed by organs that perform individual specific function. a organism is formed by different organ systems
describe and explain division of labour in a unicellular organism
Different parts of the cell / organelles perform different functions in a coordinated manner to ensure its survival
