What Is A Cell? & Cell Theory

Question 1

capabilities of unicellular organisms

Answer 1

1) independent existence
2) performing essential functions of life

Question 2

define cell

Answer 2

cell is the fundamental, structural and functional unit of all living organisms

Question 3

first scientist to study a live cell

Answer 3

Anton Von Leeuwenhoek

Question 4

nucleus of cell was discovered by?

Answer 4

Robert Brown

Question 5

two main people of cell theory

Answer 5

Matthias Schleiden, german botanist
Theodore Schwann, british zoologist

Question 6

when did Matthias Schleiden make his discovery

Answer 6

1838

Question 7

when did Theodore Schwann make his discovery

Answer 7

1839

Question 8

Matthias Schleiden discovery

Answer 8

all plants are composed of different kinds of cells which form the tissues of the plant

Question 9

Theodore Schwann discovery

Answer 9

(animal cells) cells had a thin outer layer known as plasma membrane
(plant cells) presence of cell wall is a unique character of plant cells
(hypothesis) bodies of plants and animals are composed of cells and their products

Question 10

limitation of cell theory

Answer 10

did not explain how new cells were formed

Question 11

who modified cell theory

Answer 11

Rudolf Virchow

Question 12

when did Rudolf Virchow modify the cell theory

Answer 12

1855

Question 13

what did Rudolf Virchow explain

Answer 13

cells divided and new cells are formed from the pre-existing cells
omnis cellula-e cellula

Question 14

postulates of cell theory

Answer 14

1) all living organisms are composed of cells and their products
2) all cells arise from pre-existing cells