General Biology 121 MSU EXAM 1 QUESTIONS WITH
COMPLETE SOLUTIONS
Approximately how long ago did life begin on earth? Correct
Answers 3.85 mya
Be able to identify 3 major points of cell theory Correct
Answers -all living things are made up of 1 or more cells
-all living cells come from older cells
-the cell is the building block of all living organisms
Be able to identify the 4 stages that contributed to the origin of
life Correct Answers 1 abiotic synthesis of molecules
2 macromolecules begin to form
3 molecules begin to pack tightly and form protobionts
4 self replicating molecules begin to form
Be able to recognize a negative and positive feedback system.
Correct Answers a positive feedback system encourages a
physiological process or amplifies the action of a system
Be familiar with DNA molecules Correct Answers A-T C-G
Besides the reducing atmosphere hypothesis, what other 2
hypothesis may help to explain the origin of life? Correct
Answers -deep sea vents spewed key hydrogen rich and could
then form organic molecules
-mineral crystals in clay could have arranged organic molecules
into organized patterns. After a while, organic molecules took
over this job and organized themselves.
,define biology. Correct Answers the study of life
how do complex structures come about? Correct Answers
through natural selection, traits that provided a favorable
advantage in surviving are kept and improved upon as mutations
occur to further improve the trait
how does gene flow, mutations, and natural selection affect
evolution? Correct Answers all change the rate at which genes
are expressed in a population and contribute to why evolution
happens
how does the fossil record provide evidence of evolution of
species? Correct Answers its provides solid evidence that shows
that organisms from the past aren't the same as they are today
how is genetic variation the substrate for natural selection?
Correct Answers natural selection can only act on genetic
variances in a population.
How many domains are there? Correct Answers 3
How many Kingdoms are there? Correct Answers 4
how many mass extinctions have happened? Correct Answers 5
inference 1 by ernst mayer Correct Answers production of more
individuals than the environment can support leads to a struggle
for existence, with only a fraction of offspring surviving
, inference 2 by ernst mayer Correct Answers survival depends in
part on inherited traits and differential reproductive success
inference 3 by ernst mayer Correct Answers change in allele
frequencies over time
Know basic differences between prokaryotic and eukaryotic
cells Correct Answers prokaryotic is single cellular
eukaryotic is multicellular
know basic information about scientific method Correct
Answers -make an observation
-ask questions
-form a hypothesis
-test hypothesis
-analyze data
- conclusion
know basics of examples of natural selection Correct Answers
bugs becoming resistant to pesticides
know hierarchial classification Correct Answers Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
COMPLETE SOLUTIONS
Approximately how long ago did life begin on earth? Correct
Answers 3.85 mya
Be able to identify 3 major points of cell theory Correct
Answers -all living things are made up of 1 or more cells
-all living cells come from older cells
-the cell is the building block of all living organisms
Be able to identify the 4 stages that contributed to the origin of
life Correct Answers 1 abiotic synthesis of molecules
2 macromolecules begin to form
3 molecules begin to pack tightly and form protobionts
4 self replicating molecules begin to form
Be able to recognize a negative and positive feedback system.
Correct Answers a positive feedback system encourages a
physiological process or amplifies the action of a system
Be familiar with DNA molecules Correct Answers A-T C-G
Besides the reducing atmosphere hypothesis, what other 2
hypothesis may help to explain the origin of life? Correct
Answers -deep sea vents spewed key hydrogen rich and could
then form organic molecules
-mineral crystals in clay could have arranged organic molecules
into organized patterns. After a while, organic molecules took
over this job and organized themselves.
,define biology. Correct Answers the study of life
how do complex structures come about? Correct Answers
through natural selection, traits that provided a favorable
advantage in surviving are kept and improved upon as mutations
occur to further improve the trait
how does gene flow, mutations, and natural selection affect
evolution? Correct Answers all change the rate at which genes
are expressed in a population and contribute to why evolution
happens
how does the fossil record provide evidence of evolution of
species? Correct Answers its provides solid evidence that shows
that organisms from the past aren't the same as they are today
how is genetic variation the substrate for natural selection?
Correct Answers natural selection can only act on genetic
variances in a population.
How many domains are there? Correct Answers 3
How many Kingdoms are there? Correct Answers 4
how many mass extinctions have happened? Correct Answers 5
inference 1 by ernst mayer Correct Answers production of more
individuals than the environment can support leads to a struggle
for existence, with only a fraction of offspring surviving
, inference 2 by ernst mayer Correct Answers survival depends in
part on inherited traits and differential reproductive success
inference 3 by ernst mayer Correct Answers change in allele
frequencies over time
Know basic differences between prokaryotic and eukaryotic
cells Correct Answers prokaryotic is single cellular
eukaryotic is multicellular
know basic information about scientific method Correct
Answers -make an observation
-ask questions
-form a hypothesis
-test hypothesis
-analyze data
- conclusion
know basics of examples of natural selection Correct Answers
bugs becoming resistant to pesticides
know hierarchial classification Correct Answers Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
