2. Cell Theory

Question 1

In ____ year, a scientist named _____ observed that all plants are composed of different kinds of cells that form tissues.

Answer 1

1838; Matthias Schleiden [German botanist]

Question 2

In __ year, a scientist named _____ reported that the thin outer layer of animal cells, now known as ____.

Answer 2

1839;
Theodore Schwann [British Zoologist];
Plasma membrane

Question 3

T. Schwann also concluded that ____ is the presence of a unique character of plant cells.

Answer 3

Cell Wall

Question 4

The hypothesis given by T. Schwann is the bodies of animals and plants are composed of cells and products of cells.
T/F

Answer 4

True

Question 5

Who formulated the cell theory?

Answer 5

Schleiden and Schwann

Question 6

Cell Theory (proposed by Schleiden and Schwann) didn’t explain ____.

Answer 6

How new cells formed

Question 7

In __ year, ____ first explained that cells divided and new cells are formed from pre-existing cells (Omnis cellula-e cellula).

Answer 7

1855; Rudolf Virchow

Question 8

____ modified the hypothesis of Schleiden and Schwann to give the cell theory a final shape

Answer 8

Rudolf Virchow

Question 9

Cell theory as understood today is:

Answer 9

(i) All living organisms are composed of cells and products of cells (given by both Schleiden and Schwann)
(ii) all cells arise from pre-existing cells (Given by Rudolf Virchow)