Mod 2: Organisation of cells

Question 1

what are the three different types of organisms?

Answer 1

unicellular, colonial, multicellular

Question 2

what is a unicellular organism?

Answer 2

it is a single cell that is responsible for all of its own life processes
prokaryotic and eukaryotic unicellular organisms

Question 3

what are colonial organisms

Answer 3

a group of identical unicellular organisms that can carry out all life processes necessary for life but can also have specialised functions within the colony. This leads to more efficient cell function.

Question 4

what are multicellular organisms?

Answer 4

organisms that are made up of many different types of cells where similar types of cells group together and perform specialised functions to help the organism function properly.
the specialised cells cannot live independently (unlike colonial and unicellular organisms)

Question 5

state the hierarchy of structural organisation

Answer 5

atoms –> molecules –> organelles –> cells –> tissue –> organs –> organs systems –> multicellular organism

Question 6

what are stem cells

Answer 6

undifferentiated cells that can divide many times for a long period of time to make more cells.
can be embryonic or adult stem cells

Question 7

what is differentiation?

Answer 7

the process stem cells go through to become specialised

Question 8

when can a cell no longer differentiate?

Answer 8

after a cell has become specialised to form a specific type of cell, it can no longer differentiate to become a different type o cell. they may even lose their ability to divide and make more cells

Question 9

what are the cells that dont divide constantly?

Answer 9

sex cells (sperm and ova)

Question 10

what is the importance of cell structure?

Answer 10

the function of a cell is heavily reliant on the structure of it and vice versa

Question 11

what are the four types of tissue in complex animals?

Answer 11

epithelial, connective, nervous, muscle