The main difference between prokaryotic and eukaryotic cells is that
a. prokaryotic cells are always much larger.
b. prokaryotic cells do not have a plasma membrane.
c. eukaryotic cells have a smaller cell nucleus.
d. eukaryotic cells have a more complex cellular organization.

The correct answer is option D.

Explanation:

Eukaryotic cells are the complex cellular organization with several specialized cellular organelles and a true nucleus in the center of the cell with genetic material present in it. The eukaryotic cell is more like a building with complex structures and parts with different functions specified with it.

In contrast, prokaryotic cells are more like a stadium with a simple organization without membrane-bound cell organelles and these cells lack true nucleus in them and genetic material also present in the cytoplasm.

Thus, the correct answer is option D.

sadness is not good

explanation:

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.