lesson 2- cell theory

Question 1

fracesco redi

Answer 1

set out flasks containing raw meat; they unsealed flask attracted bacteria and bugs, the sealed flask doesn’t attract bacteria or bugs, flask covered with gauze attracts bugs and bacteria on the top of the gauze

Question 2

spontaneous generation

Answer 2

life could arise from non-living matter

Question 3

john Needham

Answer 3

-put chicken broth in a flask and sealed it, except microorganism still grew in broth

Question 4

Lazzaro Spallanzani

Answer 4

repeated Needham’s but drew air out of the flask- nothing grew

Question 5

louis Pasteur

Answer 5

-neck flask into an “s” shape
- air could enter but dust and microorganisms would get caught in the neck

Question 6

variables of Pasteur’s experiment

Answer 6

manipulated- access to dust in flask
responding- ability to grow mold
controlled x2- nothing changed (eg. flask shape, flask size)

Question 7

what did Pasteur’s experiment show?

Answer 7

SPONTONIOUS GENERATION DOES NOT EXSIST

Question 8

where do microorganisms come from according to Pasteur?

Answer 8

from the air

Question 9

robert brown

Answer 9

discovered the nucleus of the cell

Question 10

mj scheidon

Answer 10

observed all plants were made of cells, nucleus LIKELY responsible for development of cell

Question 11

proposed all plants and animals were made of cells

Answer 11

theodore schwann and schleiden

Question 12

cell theory states that

Answer 12

1. ALL LIVING things are made up of one of more cells and materials produced are by the cells
2. ALL life functions take place in cells, aka they are the smallest unit of life
3. all cells are produced from pre existing cells through cell division