Cell discovery and theory

What is the cell?

• A type of fruit found in nature
• A unit of measurement for electricity
• The basic structure and functional unit of all living organisms
• A type of building material used in construction

In 1590 Dutch lens grinders Hans and Zacharias Janssent invent:

• The first digital camera
• The first airplane
• The first electric car
• The first compound microscope by placing two lenses in a tube

In 1665 a scientist observed cork and names the tiny chambers that he sees cells

Who is the scientist?

Answer: Robert Hooke

• Robert Hooke
• Anton Van Leeuwenhoek

• Mattathias Schledian

• Theodor Schawan

Dutch biologist Discovers single celled animal like organisms now called protozoans. Who is he?

• Robert Hooke

• Rudolph Virchow

• Anton Van Leuwenhoek

• Theodor Schwann

German scientist studied plant tissues and concluded that all plants are composed of cells. Who is he?

• Rudolph Virchow

• Matthias Schledian

• Theodor Schwann

• Robert hooke

German scientist reported that animal tissues also consisted of individual cells, Who is he?

• Anton Van Leuwenhoek

• Mattathias Schledian

• Robert Hooke

• Theodor Schwann

The scientist that proposed that all cells are produced from division of existing cells?

• Matthias Schwann

• Rudolph Virchow

• Robert Hooke

• Anton Leuwenhoek

FINAL EXAM:

Identify the principles of the cell theory:

• cells are the basic unit of structure and organization of all living organisms

• Cells are the basic unit of structure and organization of all non-living organisms
• All living organisms are composed of cells

• All living cells are composed of one or more atoms
• cells arise only from previously existing cells, with cells passing copies of their genetic material onto their daughter cells

What are the types of non optical microscopes?

• Transmission electron microscope, Scanning electron microscope, and scanning tunneling electron microscope
• Fluorescence microscope, Phase contrast microscope, and Darkfield microscope
• X-ray microscope, Atomic force microscope, and Infrared microscope
• Ultraviolet microscope, Polarizing microscope, and Confocal microscope

Characteristics of Transmission electron microscope?

• Magnify up to 1,000x, the specimen can be alive, does not require staining, Forms colorful images of the specimen
• Magnify up to 500,000x, the specimen must be dead, sliced very thin and stained with heavy metals, Forms black and white shaded images of the specimen
• Magnify up to 100,000x, the specimen must be alive, does not require slicing, Forms 3D images of the specimen
• Magnify up to 10,000x, the specimen must be dead, sliced very thick and stained with light metals, Forms colorful images of the specimen