BIO 101 CLASS 2 NOTES WELL EXPLAINED AND
ACCURATE
Evolution
o The unity of life is based on DNA and a common genetic code
▪ The diversity of life arises from differences in DNA sequences
▪ Life has a unity and diversity
o The diversity of life can be arranged into 3 domains
▪ Bacteria are the most diverse and widespread prokaryotes
Single celled ??
▪ Archeae are prokaryotes that often live in Earth’s extreme environments
Single celled with no nuclei
▪ Eukarya have eukaryotic cells and include
Single-celled protists and
Multicellular fungi, animals, and plants
o 1.7 Evolution explains the unity and diversity of life
▪ From his observations, Darwin inferred
Individuals with heritable traits best suited to environment
more likely to survive and reproduce
This unequal reproductive success over many generations, an
increasing proportion of individuals with advantageous traits
Result: evolutionary adaptation, accumulation of favorable traits
in a population over time
o Same adaptations would only occur with same weather and
, BIO 101 CLASS 2 NOTES WELL EXPLAINED AND
ACCURATE
outside factors
o 1.11 EVOLUTION CONNECTION: evolution is connected to our everyday lives
▪ Human-caused environmental change are powerful selective forces that
affect the evolution of many species, including
Antibiotic-resistant bacteria
Pesticide-resistant bacteria
Endangered species, and
Increasing rates of extinction
o Technology evolves by the same kinda process,
natural selection by consumers
New variations don’t come about from climate changes,
climate changes simply bring out already occurring adaptations
Molecules
o Objectives
▪ Explain how a cell can make large molecules from a small set
of molecules
▪ Define polysaccharides and explain their functions
▪ Define lipids, and explain their functions
▪ Describe the chemical structure of proteins and their importance
▪ Describe the chemical structure of nucleic acids and how they relate
to inheritance
▪ Explain how lactose tolerance has evolved in humans
ACCURATE
Evolution
o The unity of life is based on DNA and a common genetic code
▪ The diversity of life arises from differences in DNA sequences
▪ Life has a unity and diversity
o The diversity of life can be arranged into 3 domains
▪ Bacteria are the most diverse and widespread prokaryotes
Single celled ??
▪ Archeae are prokaryotes that often live in Earth’s extreme environments
Single celled with no nuclei
▪ Eukarya have eukaryotic cells and include
Single-celled protists and
Multicellular fungi, animals, and plants
o 1.7 Evolution explains the unity and diversity of life
▪ From his observations, Darwin inferred
Individuals with heritable traits best suited to environment
more likely to survive and reproduce
This unequal reproductive success over many generations, an
increasing proportion of individuals with advantageous traits
Result: evolutionary adaptation, accumulation of favorable traits
in a population over time
o Same adaptations would only occur with same weather and
, BIO 101 CLASS 2 NOTES WELL EXPLAINED AND
ACCURATE
outside factors
o 1.11 EVOLUTION CONNECTION: evolution is connected to our everyday lives
▪ Human-caused environmental change are powerful selective forces that
affect the evolution of many species, including
Antibiotic-resistant bacteria
Pesticide-resistant bacteria
Endangered species, and
Increasing rates of extinction
o Technology evolves by the same kinda process,
natural selection by consumers
New variations don’t come about from climate changes,
climate changes simply bring out already occurring adaptations
Molecules
o Objectives
▪ Explain how a cell can make large molecules from a small set
of molecules
▪ Define polysaccharides and explain their functions
▪ Define lipids, and explain their functions
▪ Describe the chemical structure of proteins and their importance
▪ Describe the chemical structure of nucleic acids and how they relate
to inheritance
▪ Explain how lactose tolerance has evolved in humans
