BIO 151 UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS COMPLETE
STUDY GUIDE
●● How long did it take life to evolve once the Earth was formed?
Answer: 600 million years
●● What was the key ingredient needed for the development of life?
Answer: water
●● Who evolved first, prokaryotes or eukaryotes?
Answer: prokaryotes
●● Cyanobacteria are blue/green because they get energy from-------.
Answer: photosynthesis
- they have chlorophyll which is why they have the same pigment as
plants
●● How long have modern humans been around for?
Answer: 200,000
●● Which levels of structure are found only in multicellular organisms?
,Answer: - order
- response to stimuli
- reproductive
- adaption
- growth and development
- regulation
- homeostasis
- energy processing
●● Give an example of a stimulus.
Answer: - a stimulus is anything that can be detected by a life form
- light, temperature
●● In all organisms, reproduction involves passing down____________
to the next generation.
Answer: DNA
●● Organisms are generally well adapted to their environments. Why is
this?
Answer: Because of evolution
●● What is a gene? How do genes affect physical traits?
,Answer: - a gene is a segment of DNA that contain information for a
specific protein
- genes provide instructions for each species special trait
●● What does it mean to maintain homeostasis? Give an example.
Answer: - to maintain homeostasis it means to keep a steady state
- an example of this is keeping the same body temperature, when its
higher or lower then we know something is wrong
●● What are the two most common sources of energy for organisms?
Answer: food & photosynthesis
●● What is an organism? What sorts of things are NOT organisms?
Answer: - an organism is an entity that has the properties of life
- something that isn't an organism is a virus and anything that isn't living
●● What is an atom?
Answer: tiny particles that make up matter
●● What are the three parts of an atom?
Answer: electrons, protons, neutrons
●● What is the mass and charge of each part of an atom?
, Answer: neutron= mass: 1 charge: 0
proton = mass: 1 charge: +1
electron= mass: negligible mass charge: -1
●● How does each part of the atom affect it's properties?
Answer: neutron = the mass of the atom
proton= atom's identity
electron= atoms bonding behavior
●● What are the six elements making up most of the mass of living
organisms?
Answer: - carbon
- nitrogen
- oxygen
- hydrogen
- sulfur
- phosphorus
●● How many electrons can fit in the first orbital (the s orbital)?
Answer: 2 electrons
●● What about p orbitals?
AND CORRECT ANSWERS COMPLETE
STUDY GUIDE
●● How long did it take life to evolve once the Earth was formed?
Answer: 600 million years
●● What was the key ingredient needed for the development of life?
Answer: water
●● Who evolved first, prokaryotes or eukaryotes?
Answer: prokaryotes
●● Cyanobacteria are blue/green because they get energy from-------.
Answer: photosynthesis
- they have chlorophyll which is why they have the same pigment as
plants
●● How long have modern humans been around for?
Answer: 200,000
●● Which levels of structure are found only in multicellular organisms?
,Answer: - order
- response to stimuli
- reproductive
- adaption
- growth and development
- regulation
- homeostasis
- energy processing
●● Give an example of a stimulus.
Answer: - a stimulus is anything that can be detected by a life form
- light, temperature
●● In all organisms, reproduction involves passing down____________
to the next generation.
Answer: DNA
●● Organisms are generally well adapted to their environments. Why is
this?
Answer: Because of evolution
●● What is a gene? How do genes affect physical traits?
,Answer: - a gene is a segment of DNA that contain information for a
specific protein
- genes provide instructions for each species special trait
●● What does it mean to maintain homeostasis? Give an example.
Answer: - to maintain homeostasis it means to keep a steady state
- an example of this is keeping the same body temperature, when its
higher or lower then we know something is wrong
●● What are the two most common sources of energy for organisms?
Answer: food & photosynthesis
●● What is an organism? What sorts of things are NOT organisms?
Answer: - an organism is an entity that has the properties of life
- something that isn't an organism is a virus and anything that isn't living
●● What is an atom?
Answer: tiny particles that make up matter
●● What are the three parts of an atom?
Answer: electrons, protons, neutrons
●● What is the mass and charge of each part of an atom?
, Answer: neutron= mass: 1 charge: 0
proton = mass: 1 charge: +1
electron= mass: negligible mass charge: -1
●● How does each part of the atom affect it's properties?
Answer: neutron = the mass of the atom
proton= atom's identity
electron= atoms bonding behavior
●● What are the six elements making up most of the mass of living
organisms?
Answer: - carbon
- nitrogen
- oxygen
- hydrogen
- sulfur
- phosphorus
●● How many electrons can fit in the first orbital (the s orbital)?
Answer: 2 electrons
●● What about p orbitals?
