Chapter 1

Question 1

What did Robert Hooke discovered?

Answer 1

He took a thin slice of a cork and discovered cells.

Question 2

What did the first law of the cell theory state?

Answer 2

All organism are composed of one or more cells

Question 3

What did the second law of the cell theory state?

Answer 3

The cell is the structural unit of life

Question 4

What did the third law of the cell theory state?

Answer 4

All cells come from preexisting cells

Question 5

What did the Pasteur Experiment prove?

Answer 5

Living cells come from preexisting cells

Question 6

How did the Pasteur Experiment work?

Answer 6

Pasteur took two flasks, one normal and one with a goose neck. He pour beef broth inside the flasks and boiled to kill any preexisting organism in the flask. The flasks remained untouched and after some time, the normal flasks become clouded and the goose neck flask contained no bacteria.

Question 7

What did Pasteur experiment mean?

Answer 7

The idea was that the bend in the neck prevented falling particles from reaching the broth, while still allowing the free flow of air. The normal flask allowed falling particles. If bacteria did spontaneously appear, then both flask will contain bacteria even though the goose neck was designed to prevent external factors from entering the flask.

Question 8

What is Pasteurization

Answer 8

Low Heat treatment food preservation method that kills microorganisms present in the food. Because less heat is being used, the food will not be denature.

Question 9

What is sterilization?

Answer 9

Using high heat to extend shelf life by a few month.

Question 10

What are the differences between sterilization and pasteurization?

Answer 10

Sterilization kills all microorganisms using high heat while pasteurization kills only the pathogenic bacteria by heating to a certain temperature.

Question 11

What do all cells share despite varying in appearance and function?

Answer 11

Cells share similar basic chemistry