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.

• 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.

• bacterial fermentation
• regeneration of old cells.
•  pre-existing cells.
• abiotic materials.

Which of the following is not correct?

•  Robert Brown discovered the cell.
• Schleiden and Schwann formulated the cell theory.
• Virchow explained that cells are formed from pre-existing cells.
• A unicellular organism carries out its life activities within a single cell.