Cell Theory

Question 1

Robert Hooke/1665

Answer 1

• improves microscope
• looks under cork at 30X
• calls “empty boxes” cells

Question 2

Antoni Van Leeuwenhoek/1674

Answer 2

• first to see/describe singular micro-organisms
• 500X on microscope
• called dem “animalcules”

Question 3

Robert Brown/1833

Answer 3

• identified nucleus

- named nucleus

Question 4

Matthias Schleiden + Theodor Schwann/1838/1839

Answer 4

• MS- studied plants
• TS- studied animals
• noticed differences and similarities
• developed cel theory

Question 5

CELL THEORY

Answer 5

1. All living organisms are composed of one or more cells.
2. Cells are the functional units of life.
3. All cells are produced from pre-existing cells through the process of cell division.

Question 6

Viruses + prions

Answer 6

• subcellular particles

- not considered biotic or abiotic

Question 7

Viruses

Answer 7

• have genome
• only reproduce w host cell
• bacterial ones = bacteriophage

Question 8

Bacteriophage

Answer 8

• made of protein/capsid and nucleus acids (DNA/RNA)

- animal viruses can have viral envelope (derived from host membrane)

Question 9

Prions

Answer 9

• infectious proteins
• can be human/animal diseases
• trigger chain reaction
• transmissible