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BIOL 101 Exam 1 Questions with Verified Answers
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BIOL 101 Exam 1 Questions with Verified Answers
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BIOL 101 Exam 1 Questions with VerifiedAnswers
What is science?
What is biology?
Why is biological literacy essential in the modern world? - Answer-Science - collection
of facts; process for understanding the world; involves objective observation and
experimentation
Biology - the study of living things
Biological Literacy - use scientific inquiry; communicate ideas about biology to others;
integrate ideas about biology into your decision making
- Avoid being bamboozled
What are the steps of the Scientific Method?
Do these steps always need to be followed in sequential order? - Answer-1.) Make
observations
2.) Formulate a hypothesis
3.) Devise a testable prediction
4.) Conduct a critical experiment
5.) Draw conclusions and make revisions
Doesn't necessarily continue linerally
What are some important characteristics of a hypothesis?
Why is the experiment an important part of the Scientific process? - Answer-Important
characteristics - must accomplish:
1.) Clearly establish mutually exclusive alt. explanations. Be clear if the proposed
explanation isn't supported by evidence or further observations, a different hypothesis is
a more likely explanation.
2.) Generate testable predictions. Evaluate the validity of a hypothesis only by putting it
to the test.
A critical experiment makes it clear whether a hypothesis is correct
What is the difference between a hypothesis and a theory?
What are some examples of scientific theories? - Answer-- Hypothesis - proposed
explanation for a phenomenon/ observation
, - Thesis - working explanation for natural phenomenon that is exceptionally well-
supported by the data
- A hypothesis that has withstood the test of time and is unlikely to be altered by any
new evidence
- Cell Theory - organisms are composed of cells and all cells come from preexisting
cells
- Theory of Evolution by Natural Selection - species can change over time and all
species are related to one another through common ancestry
How do scientists define life? - Answer-2 Characteristics:
1.) Ability to replicate
2.) Ability to carry out some sort of metabolism
What are the 3 phases or steps involved in making life possible? - Answer-1.) Formation
of small molecules containing carbon and hydrogen
2.) Formation of self-replicating info-containing molecules
3.) Development of a membrane enabling metabolism and creating the 1st cells
How do you define a species? - Answer-- Species - label different kinds of organisms
- Biological Species Concept - populations of individuals that interbreed with each other
or could possibly interbreed (and their babies can have babies)
- Reproductive Isolation - populations that cannot interbreed with organisms outside
their own group
* Many exceptions outside of the plant and animal kingdoms
What are the 4 eukaryotic kingdoms? Give an example of each? - Answer-1.) Plants -
snakes, dolphins, nudibranch
2.) Animals - dodder, moss, liverwort
3.) Fungi - mushrooms, yeasts, molds
4.) Protists - amoebas, paramecia, and algae
How do we define protists? - Answer-- Unicellular organisms that don't fit in the other
eukaryotic kingdoms
- Not a monophyletic group
- Can't see with the naked eye
How is the diversity of life categorized? (Taxonomic order) - Answer-Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
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