L 7.1 Life is Cellular

Question 1

What is the cell theory?

Answer 1

The cell theory states:

• All living things are made up of cells.
• Cells are the basic units of structure and function in living things.
• New cells are produced from existing cells.

Question 2

what did Hooke do?

Answer 2

used an early compound microscope
to look at a nonliving thin slice of cork, a plant
material. He saw empty chambers and called them
“cells”

Question 3

what did Leeuwenhoek do?

Answer 3

used a single-lens microscope to observe pond water

and saw living cells

Question 4

what did Schleiden do?

Answer 4

Concluded that all plants are made of cells

Question 5

what did Schwann do?

Answer 5

Concluded that all animals are made of cells

Question 6

what did Virchow do?

Answer 6

concluded that new cells can be produced only from the

division of existing cells

Question 7

How do microscopes work?

Answer 7

Most microscopes use lenses to magnify the image of an object by focusing light or electrons.

Question 8

How are prokaryotic and eukaryotic cells different?

Answer 8

Prokaryotic cells do not separate their genetic material within a nucleus.

In eukaryotic cells, the nucleus separates the genetic material from the rest of the cell.