Question

the cell is the smallest unit of life. cells are often called the building blocks of life.
cells are either prokaryotic cells or eukaryotic cells. within each of these groups, cells may vary greatly in their size, shape, and functional role.
prokaryotic cells

• prokaryotic cells are bacterial cells.
• prokaryotic cells lack a membrane - bound nucleus or any membrane - bound organelles.
• they are small (generally 0.5 - 10 μm) single cells (unicellular).
• they are relatively basic cells and have very little cellular organization (their dna, ribosomes, and enzymes are free floating within the cell cytoplasm).
• single, circular chromosome of naked dna.
• prokaryotes have a cell wall, but it is different from the cell walls that some eukaryotes have.

eukaryotic cells

• eukaryotic cells have a membrane - bound nucleus, and other membrane - bound organelles.
• plant cells, animals cells, fungal cells, and protists are all eukaryotic cells.
• eukaryotic cells are large (30 - 150 μm). they may exist as single cells or as part of a multicellular organism.
• multiple linear chromosomes consisting of dna and associated proteins.
• they are more complex than prokaryotic cells. they have more structure and internal organization.

questions 1 & 2 (a) (b)

1. what are the main features of a prokaryotic cell?

2 (a) what are the main features of a eukaryotic cell?
(b) name examples of eukaryotic cells:

Explanation:

Question 1

To determine the main features of a prokaryotic cell, we refer to the provided text under the "Prokaryotic cells" section. It states that prokaryotic cells are bacterial cells, lack a membrane - bound nucleus and other membrane - bound organelles, are small (0.5 - 10 μm) and unicellular, have basic cellular organization with DNA, ribosomes, and enzymes free - floating in the cytoplasm, have a single circular chromosome of naked DNA, and have a cell wall different from some eukaryotes' cell walls.

For the main features of a eukaryotic cell, we look at the "Eukaryotic cells" section. It says that eukaryotic cells have a membrane - bound nucleus and other membrane - bound organelles, include plant, animal, fungal, and protist cells, are large (30 - 150 μm) and can be unicellular or part of a multicellular organism, have multiple linear chromosomes of DNA and associated proteins, and are more complex with more structure and internal organization.

From the "Eukaryotic cells" section, the examples of eukaryotic cells are given as plant cells, animal cells, fungal cells, and protist cells.

Answer:

• Are bacterial cells.
• Lack a membrane - bound nucleus and other membrane - bound organelles.
• Small (0.5 - 10 μm), unicellular.
• Basic cellular organization (DNA, ribosomes, enzymes free - floating in cytoplasm).
• Single, circular chromosome of naked DNA.
• Have a cell wall (different from some eukaryotes' cell walls).

Question 2 (a)