Which of the following is not a part of all cells?
a. ribosomes
c. endoplasmic reticulum
b. cell wall
d. cytoplasm

Its B.cell wall

ribosomes are used to synthesis proteins and other components required for cells 

endoplamsic reticulum is where the ribosomes are its a structure that helps to prepare the components and to bring them to the golgi body 

the cell wall is only present in plants (cellulose) and fungi (chitin) and it helps plants to regulate their water intake physically

the cytoplasmis present in all cells as the medium which organelles are suspended in and in contact with

hope that helps 

Three reasons of the deaths of native americans: new illnesses that their immune systems couldn't cope with. genocides so the settlers could have the good land.starvation from lack of rations and poor infertile land on resevations