BIO 140 COMPLETE ACTUAL EXAM SET
WITH QUESTIONS AND
CORRECT/VERIFIED ANSWERS
What do biologists mean when they say unity in diversity? - correct answer-✅all organisms are different
but they are made from the same basic unit of life
How old is the earth? - correct answer-✅4.5 billion years old
How long ago has life been present on earth? - correct answer-✅3.8 billion years ago first fossils
how is life thought to have originated on earth (three events) - correct answer-✅1. RNA developed
2. RNA can serve as an enzyme and create other molecules
3. phospholipid bilayer creates a membrane to pull everything into one place (aka create a cell)
what molecule is thought to have been the genetic material in early cells - correct answer-✅RNA
how might RNA have resulted in more complex molecules? - correct answer-✅RNA has the ability to
fold on itself and create 3D structures that can act as catalysts (enzymes) which create more complex
molecules
most likely, how did the first cell membranes form? - correct answer-✅phospholipid bilayer
what three properties did the first cells have? - correct answer-✅simple,
single celled,
small,
formed in a water environment
How did photosynthesis promote the movement of life to land? - correct answer-✅1. living things could
capture energy from the sun, and created O2
2. O2 in the atmosphere became O3 (ozone) which protects the earth from UV rays
3. life could move to land without being destroyed
what is the advantage for multicellular organisms vs unicellular organisms? - correct answer-
✅multicellular organisms have longer life spans because of their ability to perform multiple functions
due to their number of cells
Stanley Miller's experiment - correct answer-✅science dude created a simulated earth environment to
determine the possibility of spontaneous life formation
"ocean"--water
"atmosphere"--heat, methane, ammonia (NH3), and hydrogen, with electrical sparks transmitted
through electrodes to stimulate lightning
Samples collected: organic molecules formaldehyde (CH20) and hydrogen cyanide (HCN), amino acids,
and hydrocarbons
why did Stanley Miller's experiment matter? - correct answer-✅proves a great likelihood that organic
molecules were able to synthesize spontaneously on earth
what three domains of organisms exist on earth? - correct answer-✅1. eukarya
2. archaea
3. bacteria
what are the six kingdoms of organisms existing on earth? - correct answer-✅1. plants
2. animals
3. fungi
4. protista
5. bacteria
WITH QUESTIONS AND
CORRECT/VERIFIED ANSWERS
What do biologists mean when they say unity in diversity? - correct answer-✅all organisms are different
but they are made from the same basic unit of life
How old is the earth? - correct answer-✅4.5 billion years old
How long ago has life been present on earth? - correct answer-✅3.8 billion years ago first fossils
how is life thought to have originated on earth (three events) - correct answer-✅1. RNA developed
2. RNA can serve as an enzyme and create other molecules
3. phospholipid bilayer creates a membrane to pull everything into one place (aka create a cell)
what molecule is thought to have been the genetic material in early cells - correct answer-✅RNA
how might RNA have resulted in more complex molecules? - correct answer-✅RNA has the ability to
fold on itself and create 3D structures that can act as catalysts (enzymes) which create more complex
molecules
most likely, how did the first cell membranes form? - correct answer-✅phospholipid bilayer
what three properties did the first cells have? - correct answer-✅simple,
single celled,
small,
formed in a water environment
How did photosynthesis promote the movement of life to land? - correct answer-✅1. living things could
capture energy from the sun, and created O2
2. O2 in the atmosphere became O3 (ozone) which protects the earth from UV rays
3. life could move to land without being destroyed
what is the advantage for multicellular organisms vs unicellular organisms? - correct answer-
✅multicellular organisms have longer life spans because of their ability to perform multiple functions
due to their number of cells
Stanley Miller's experiment - correct answer-✅science dude created a simulated earth environment to
determine the possibility of spontaneous life formation
"ocean"--water
"atmosphere"--heat, methane, ammonia (NH3), and hydrogen, with electrical sparks transmitted
through electrodes to stimulate lightning
Samples collected: organic molecules formaldehyde (CH20) and hydrogen cyanide (HCN), amino acids,
and hydrocarbons
why did Stanley Miller's experiment matter? - correct answer-✅proves a great likelihood that organic
molecules were able to synthesize spontaneously on earth
what three domains of organisms exist on earth? - correct answer-✅1. eukarya
2. archaea
3. bacteria
what are the six kingdoms of organisms existing on earth? - correct answer-✅1. plants
2. animals
3. fungi
4. protista
5. bacteria
