organisation of cells Flashcards
define unicellular organisms with examples
organisms consisting of one cell e.g. bacteria, archea
define colonial organisms with examples
collection of unicellular organisms living together performing the same function e.g. coral, mosses
define multicellular organisms with examples
collection of cells that have differentiated to perform specific functions
what is the structure of a unicellular organism at cell level
basic prokaryotes (no membrane bound organelles)
what is the structure of a colonial organism at cell level
basic prokaryotes (no membrane bound organelles)
what is the structure of a multicellular organism at cell level
eukaryotes (membrane bound organelles)
what is the link between the structure of cells to function for unicellular organisms?
no specialisation as only one cell
what is the link between the structure of cells to function for colonial organisms?
no specialisation as only one cell however can combine for better protection against predators and to work together to reduce energy
what is the link between the structure of cells to function for multicellular organisms?
differentiated: cells take on different structures to better accomplish a particular function
what structure does multicellular organisms have and why
hierarchal structure to ensure each cell meets its requirements
outline the organisation of life
cell, tissue, organ, organ system, organism
since multicellular organisms have a small surface area to volume ratio, why does there need to be specialised structures and systems?
they are in place to obtain essential chemicals from their surroundings and to deliver them to all their body cells
why is the hierarchy of multicellular organisms important
each level of organisation
(cell/tissue/organ) relates to the structure and function of the level above it and below it
what is a tissue made of?
group of cells
what is an organ made of?
group of tissues
