Cell theory

Question 1

What are the three postulates of cell theory?

Answer 1

1. All living organisms are composed of cell
2. Cell is the basic unit of life
3. Cells come from pre-existing cells

Question 2

What did Robert Hooke observed under a microscope in 1665?

Answer 2

Cork cell

Question 3

What book was written by Robert Hooke?

Answer 3

Micrographia

Question 4

Who was the first scientist to observe a living cell under microscope?

Answer 4

Anton van Leeuwenhoek

Question 5

Who coined the word cell because the little boxes in the cork reminded him of monk cells?

Answer 5

Robert Hooke

Question 6

The belief that non- living matter can give rise to living things is called_____

Answer 6

spontaneous generation ( or abiogenesis/heterogenesis)

Question 7

First to discover a dead cell

Answer 7

Robert Hooke

Question 8

The word cell is derived from the Latin word ______ which means small compartment, like those in monasteries that monks or priests would inhabit

Answer 8

Cellula

Question 9

What did Anton van Leeuwenhoek used to observe the world?

Answer 9

Monocular microscope

Question 10

What are the things that Leeuwenhoek discovered?

Answer 10

bacteria, protozoa, and sperm

Question 11

Leeuwenhoek called the unicellular cells he observed as ______ because they looked like little animals to him

Answer 11

Animalcules

Question 12

Who was the first to describe the nucleus?

Answer 12

Robert Brown

Question 13

Matthias Shleiden studied______ in_____

Answer 13

Plant tissues, 1838

Question 14

Who was the scientist that proposed the extension of cell theory?

Answer 14

Rudolf Virchow

Question 15

Theodore Schwann studied______ in _______

Answer 15

Animal tissues, 1838

Question 16

He disproved spontaneous generation

Answer 16

Rudolph Virchow

Question 17

3 Proponents of cell theory

Answer 17

Matthias Schleiden, Theodore Schwann, Rudolf Virchow

Question 18

Schleiden discovered plant cell out of which______ and embryonic plants originated

Answer 18

Vegetative/Meristematic tissues

Question 19

Schwann discovered what type of animal cell? (Tip: Also called Schwann cell in his honor)

Answer 19

Muscle and nerve fiber tissues

Question 20

What was the extension of Cell theory proposed by Rudolf Virchow in 1855?

Answer 20

Cells come from pre-existing cells

Question 21

Device used to magnify objects and see organisms that are otherwise invisible to the naked eye

Answer 21

Microscope

Question 22

Is the science of magnification and resolution

Answer 22

Microscopy

Question 23

Factors affecting resolution

Answer 23

Wavelength of light, numerical aperture

Question 24

He was accredited for the creation of microscopes in 1590

Answer 24

Zaccharias Janssen

Question 25

Branches of microscopy

Answer 25

Optical, Electron, Scanning probe

Question 26

Optical and Electron microscopy measure ___________

Answer 26

refraction, diffraction, and reflection

Question 27

______ uses physical probe to interact with the surface of the specimen

Answer 27

Scanning

Question 28

9 parts of microscope

Answer 28

Ocular Lens (Eyepiece), Revolving Nosepiece, Objectives, Arm, Stage, Stage clips, Coarse Adjustment knob, Fine adjustment knob, Light Source