Notes 7 History Of Life Part 1

Question 1

Fossil evidence suggest life could have emerged approximately

Answer 1

3.8 bya

Question 2

Scientists who study ancient life are called what

Answer 2

Paleontologist

Question 3

Paleontologist divide life’s history up into a timeline called a

Answer 3

Geologic timescale

Question 4

The geologic time scale begins with earths origin

Answer 4

4.5 billion

Question 5

What is the study of rocks

Answer 5

Geology

Question 6

Fossil evidence suggests that for a long time life was _________, similar to todays ____________ and _________ eukaryotes

Answer 6

Fossil evidence suggests that for a long time life was SINGLE CELLED, similar to todays PROKARYOTES and UNICELLULAR eukaryotes

Question 7

What organisms are similar to todays bacteria

Answer 7

Prokaryotic organisms

Question 8

Today’s unicellular protist were similar to what

Answer 8

Eukaryotic organisms

Question 9

Prokaryotic cells-simple cells without internal structures called __________, todays commonly called___________

Answer 9

Prokaryotic cells-simple cells without internal structures called ORGANELLES todays commonly called BACTERIA

Question 10

Today all _________, ________,___________ _________ all have more complex cells with internal structures called organelles

Answer 10

Today all FUNGI, PROTIST,PLANT,ANIMALS all have more complex cells with internal structures called organelles

Question 11

The largest division of time is called an ________________; eons can be divided into ______________; eras are divided into_______________.

Answer 11

The largest division of time is called an EONS; eons can be divided into ERAS; eras are divided into Periods.

Question 12

What Period on the GTS spans
much of earth’s history from approximately 3.8 billion years ago to almost 1 billion years ago.

Answer 12

Precambrian

Question 13

Paleontologists divide life’s
history up on a timeline
called the _______________.

Answer 13

Geologic Timescale

Question 14

What was “invented” during this almost 3 billion year period of single-celled
life?

Answer 14

Prokaryotic organisms (similar to today’s bacteria)

Eukaryotic organisms (similar to today’s unicellular protists)

Question 15

What processes were perfected during the Precambrian Period (first 3 million years) of single celled life?

Answer 15

1. Protein Synthesis (“making”)
2. Mitosis and the Cell Cycle (how cells reproduce)
3. Fermentation (getting energy from molecules without using oxygen)
4. Photosynthesis (getting energy from sunlight; makes oxygen)
5. Cellular respiration (getting energy from molecules using oxygen)

Question 16

Protein Synthesis

Answer 16

The process in which cells make proteins.

Question 17

Mitosis and the Cell Cycle

Answer 17

How cells reproduce

Question 18

Fermentation

Answer 18

Getting energy from molecules without using oxygen.

Question 19

Photosynthesis

Answer 19

Getting energy from sunlight; makes oxygen.

Question 20

Cellular respiration