Cell Biology Question:

What are the two big groups into which cells are classified?

Answer:

Cells can be classified as eukaryotic or prokaryotic.

Prokaryotic cell is that without a delimited nucleus. Eukaryotic cells are those with nucleus delimited by membrane.

Cell Structure Review - Image Diversity: eukaryotic cell prokaryotic cell

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What is the plasma membrane of the cell? What are its main functions?	In 1665 Robert Hooke, an English scientist, published his book Micrographia, in which he described that pieces of cork viewed under the microscope present small cavities similar to pores and filled with air. Based on later knowledge of what were the walls of those cavities constituted? What is the historical importance of that observation?