Virchow explained that cells are formed from pre-existing cells.
A unicellular organism carries out its life activities within a single cell.
A.
Robert Brown discovered the cell.
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Match the following
A.
Cristae
(i)
Flat membranous sacs in stroma
B.
Cisternae
(ii)
Infoldings in mitochondria
C.
Thylakoids
(iii)
Disc-shaped sacs in Golgi apparatus.
New cells generate from
bacterial fermentation
regeneration of old cells.
pre-existing cells.
abiotic materials.
Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles ? State their function and draw labelled diagrams of both.
Which of the following is correct :
Cells of all living organisms have a nucleus.
Both animal and plant cells have a well defined cell wall.
In prokaryotes there are no membrane bound organelles.
Cells are formed by de novo from abiotic materials.
