Cell Introduction ✅

Question 1

What are the tenets of the cell theory?

Answer 1

1. plant tissue is composed of cells
2. animal tissue is composed of cells
3. all cells come from preexisting cells

Question 2

Explain the modern cell theory.

Answer 2

1. all living things are made up of cells
2. the cell is the structural and functional unit of all living things
3. all cells come from preexisting cells
4. cells contain hereditary information
5. all cells have the same chemical composition
6. all energy flow (of life) occurs within cells

Question 3

What is the average cell size?

Answer 3

• smallest cells are bacteria called mycoplasma, whose
  diameter is 0.1-1 micrometer.
• bacteria: 1-10 micrometer in diameter.
• eukaryotic cells: 10-100
  micrometers.

Question 4

What is 1 micrometer equal to?

Answer 4

1 micrometer is equal to 0.001 mm

Question 5

What are the key cell functions?

Answer 5

 ability to respond to changes in its environment.
 grow and develop across its lifespan.
 be able to reproduce, or make copies of itself.
 have metabolism.
 maintain homeostasis, or keep its internal environment the same regardless
of outside changes.
 pass on traits to its offspring.

Question 6

What is the main difference between prokaryotic cells and eukaryotic cells?

Answer 6

Eukaryotic cells contain membrane-bound organelles including the nucleus, while prokaryotic cells do not.