LS15 final ucla exam questions and answers (100% pass)
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Course
LS15
Institution
University Of California - Los Angeles
LS15 final ucla exam questions and
answers (100% pass)
what are the steps of the scientific method? - Answer️️ -1. make
observations
2. formulate hypotheses
3. make a prediction
4. conduct an experiment
5. conclusion
what 2 things make a hypothesis good? - Answer️️ -testable and ref...
what is at the core of scientific thinking? - Answer✔️✔️-the ability to
imagine a "critical experiment"
how can you increase your experiment's power? - Answer✔️✔️-1. randomize
subjects across control and experimental groups
2. control your study
3. use a double blind design
which experimental tests are better? those done in lab, or in the real world?
- Answer✔️✔️-the better controlled an experiment is, the more confidence
we should have in its results.
however, as experiments are better controlled they often are poorer models
of the situation of interest (less generalizable)
pseudoscience - Answer✔️✔️-presenting information that is not true, or was
not achieved through true scientific thinking/experiments
anecdotes - Answer✔️✔️-when we are overly biased on careful study
and/or not representative of the norm; the "vaccines cause autism" idea
pseudoscience capitalizes on the belief that: - Answer✔️✔️-scientific thinking
is a powerful method for learning about the world, and therefore people
are likely to believe pseudoscience even if it is not true
the regeneration of skin cells after a laceration may be attributed to -
Answer✔️✔️-mitosis
individuals that have the same genotype for a given trait: - Answer✔️✔️-can
have different phenotypes for that trait; environment and norm of
reactivity
when gametes are produced through meiosis, each sperm or egg generally
ends up with: - Answer✔️✔️-exactly one copy of each autosome
as predator and prey species coevolve, they are constantly engaged in an
evolutionary struggle. This is an example of: - Answer✔️✔️-the fact that a
population's environment may be changing continuously
breeders creating breeds of dogs with smaller and smaller body size are
conducting: - Answer✔️✔️-directional and natural selection; remember that
artificial selection is a subtype of natural selection
evolutionary change as a result of natural selection does NOT always lead
to: - Answer✔️✔️-increased reproductive success; environment could change
and the organisms may take a while to adapt
which mechanism of evolution consistently decreases the total genetic
variation in a population - Answer✔️✔️-directional selection
anecdotal evidence: - Answer✔️✔️-can seem to reveal links between two
phenomena even though the links do not actually exist
what does the experiment where we only let the "best" flies reproduce, in
context of time lived without food, after 60 generations - Answer✔️✔️-
species are not immutable(unchanging); we can watch them change in
nature or even cause them to change
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