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IB Bio 20 > 1. Cell Biology 1.1 Introduction to cells > Flashcards

1. Cell Biology 1.1 Introduction to cells Flashcards

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Biology 101 flashcards
1
Q

Who determined that all living things are composed of cells and that the cell is the basic unit of life? When?

A

Schleiden and Schwann in 1838

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2
Q

What did Schleiden and Schwann determine, and in what year?

A

1838: All living things are composed of cells and the cell is the basic unit of life.

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3
Q

Who determined that cells arise from pre-existing cells?

A

Virchow

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4
Q

What did Virchow determine?

A

Cells arise from pre-existing cells.

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5
Q

Who observed the cells of cork tree through a microscope? When?

A

Robert Hooke in 1655

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6
Q

What did Robert Hooke do? When?

A

He observed the cells of cork tree through a microscope in 1655.

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7
Q

Who discovered protoza and when?

A

Leewenhoek in 1674

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8
Q

Who discovered bacteria and when?

A

Leewenhoek in 1683

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9
Q

What did Leewenhoek discover? In what years?

A

Protoza: 1674
Bacteria: 1683

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10
Q

What are the 6 elements of life (basic chemical composition of all cells)

A 
Carbon
Oxygen
Nitrogen
Hydrogen
Phosphorus
Sulfur
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11
Q

What (element) based life form is being searched for?

A

Silicon

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12
Q

What does DNA stand for?

A

deoxyribonucleic acid

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13
Q

List 7 cell requirements

A 
Absorb nutrients/take in materials
Produce energy (usually ATP)
Make molecules
Grow in an organized manner
Reproduce
Respond to internal and external stimuli
Be enclosed by a plasma membrane (gives it it's integrity)
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14
Q

What does ATP stand for?

A

Adenosine triphosphate

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15
Q

Why is ATP important?

A

Energy for cells.

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16
Q

What ration is important for cell size?

A

Surface area to volume

17
Q

What theory describes the development of Eukaryotic cells from Prokaryotic cells?

A

Endoymbiotic theory

18
Q

Describe the theory that describes the creation of prokaryotic cells from volcanoes

A

A rock that exploded to make Earth was really hot.
Volcanoes exploded.
Volcanoes make CO2, ash (S8, P4, and N2), and because of the greenhouse effect, condensation created oceans (H20), and those are the 6 elements of life.

19
Q

Unicellular organism do what?

A

Carry out all functions of life within one cells.

20
Q

What is a unicellular organism?

A

An organism consisting of only one cell.

IB Bio 20 (3 decks)

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