<u>Option a,d and </u>e are the the components of cell theory as outlined by schleiden, Schwann, and virchow.
Cell theory is a scientific principle first formulated in the mid-19th century, that living organisms are made up of cells, that they're the basic structural/organizational unit of all organisms, and that each cell come from pre-present cells.
The TheCell theory states that all biological organisms are composed of cells; cells are the unit of lifestyles and all lifestyles come from preexisting life. The cellular principle is so set up nowadays that it paperwork one of the unifying concepts of biology.
The Cell theory is vital because it explains the concept of the cell and includes the subsequent postulates: The cellular is the fundamental unit of existence. All cells get up from pre-existing cells i.e Omnis cellula e cellula. All living organisms on the earth are made of cells.
Learn more about cell theory here:-brainly.com/question/3142190
#SPJ4