Lesson 541 of 1524
Cell Structure and Function
All prokaryotes have plasma membranes, cytoplasm, ribosomes, a cell wall, DNA, and lack membrane-bound organelles.
Practice this chapterAll prokaryotes have plasma membranes, cytoplasm, ribosomes, a cell wall, DNA, and lack membrane-bound organelles. Therefore, scientists must use microscopes to study cells.
The unified cell theory states that all organisms are composed of one or more cells, the cell is the basic unit of life, and new cells arise from existing cells
cell — the smallest unit of life. unified cell theory — the biological concept that states that all organisms are composed of one or more cells, the cell is the basic unit of life, and new cells arise from existing cells. cell wall — a rigid cell covering made of cellulose in plants, peptidoglycan in bacteria, non-peptidoglycan compounds in Archaea, and chitin in fungi that protects the cell, provides…. cytoplasm — the entire region between the plasma membrane and the nuclear envelope, consisting of organelles suspended in the gel-like cytosol, the cytoskeleton, and various chemicals.
Worked example
What does “cell” mean in Cell Structure and Function?
- 1Use the wording this chapter gives for cell.
- 2The book says: the smallest unit of life.
- 3Do not use the meaning of unified cell theory. That term means the biological concept that states that all organisms are composed of one or more cells, the cell is the basic unit of life, and new cells arise from existing cells.
Result: the smallest unit of life
Why. That is the meaning this chapter gives for cell.
Do not swap cell and unified cell theory. cell means the smallest unit of life. unified cell theory means the biological concept that states that all organisms are composed of one or more cells, the cell is the basic unit of life, and new cells arise from existing cells.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.