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A scientific hypothesis has all the following features EXCEPT that it is:
a possible explanation for something.
based on observations.
able to be proven true
Able to be proven true
A hypothesis is a proposed explanation of one or more observations it must be _______,_________, and not based on judgements.
An explanation supported by a very large amount of experimental evidence is a ________________.
Mehran has heard from some of his teammates that drinking a high protein supplement after football training will improve his muscle mass. He
decides to test this hypothesis by examining the effect of a high protein drink on some of his teammates compared with what happens with a control group who drink only water. Which of the following would be the best control for his
A.)randomly selected teammates who are given only small amounts of a protein drink
B.)randomly selected teammates
C.) volunteers from the general campuspopulation who are not given any protein drink
D.)volunteers from the general campus population who begin football training and are given a protein drink
E.)volunteers from the football team who agree to take a placebo instead of a protein drink
in training who are given a placebo instead of a protein drink
B.)randomly selected teammates in training who are given a placebo instead of a protein drink
(this multiple choice question has been scrambled)
A __________ is a factor in an experiment that can be manipulated.
To combine a series of specific observations to make a general principal is_________.
What is hypothesis testing based on?
*Making a prediction about the outcome of a test if/then*
_____________ Factors other than the tested hypothesis that may explain observations
The __________ variable changes throughout the experiment, the __________ is what is observed and the ________ stay the same.
Independent, dependent, Control
An experiment in which individuals are not aware of exactly what they are predicted to experience is a?
An experiment is called double blind when?
neither the subjects not the researchers know who is in the experimental and control groups
relationship between two variables
Model Organisms are typically _________.
on a graph the x-axis represents_________ variable and the ______ represents the dependent variable
__________ is the specialized branch of mathematics used to evaluate and comapare data.
_________ test can be used to extend the results from a sample to the entire population
A ___________ ____________ result is one that is very unlikely to be due to chance differences between the experimental and control groups, showing a big difference between the groups.
When an experiment has a large sample size, and there is a large difference between the results in the experimental and control groups, it is ________ that the experimental results are statistically significant.
Certain researchers have published peer-reviewed reports that use of zinc lozenges reduces the length and severity of cold symptoms. What
is one reason why some scientists are still skeptical about the merits of using zinc lozenges during a cold?
There may be other reasons why the people taking zinc lozenges recovered faster, such as stress levels or differences in their immune systems.
Effect on a chance on experimental results________
A statistical measure of the amount of variability in a sample
Statistical analysis of experimental results determines
- the likelihood that the results are due to the
- experimental treatment.
What does it mean to say that experimental results are peer reviewed?
the results are analyzed by other scientists before they are published.
Written by researchers themselves.
Books, news reports, and advertisements
Anecdotal Evidence is?
advice based on ones personal experience
All the following are signs that a website contains reliable scientific information EXCEPT that the site
A.)is set up to allow you to buy
the product being described.
B.)avoids anecdotal evidence.
C.)is frequently updated to
incorporate recent information.
D.)backs up its claims with
references to primary sources.
E.)is maintained by a reputable
A.)is set up to allow you to buy the product being described.
Imagine some table sugar dissolved in water. Which term best describes the water?
A substance that dissolves when mixed with another liquid that substance is called a ________.
When a solute is dissolved in a liquid, that liquid is called a ___________.
Because the electrons in a water molecule are shared
unequally between hydrogen and oxygen, water is said to be
Different regions/poles of the molecule have different charges means it is _______.
In general, what makes one kind of amino acid different from
other amino acids?
the side group
Polysaccharides are polymers of
_________ is the organelle that performs photosynthesis.
The ____________performs cellular respiration
______ is found in both Eukaryotic and Prokaryotic cells
The ________ defines the outer boundary of all cells, separating the cell's contents from its environment.
A(n) ________ is the fundamental structural unit of life on Earth.
Each is a lipid EXCEPT
(this multiple choice question has been scrambled)
Water,Carbohydrates,proteins,and fats are all_________.
Vitamins(supplements) are __________.
In commercial food manufacturing, hydrogenation is used to
make an unsaturated fat more saturated.
The proteins that catalyze chemical reactions in the body are called
What is the intracellular destination of nutrients that
provide energy and are the products of digestion in the human body?
With no input of cellular energy, oxygen found in a high concentration in your lungs will move through the cell membrane into the capillaries surrounding your lungs, an area of lower concentration. This is an example of
the movement of molecules form an area of high concentration to an area of low concentration
A _____________ membrane has a phospholipid bilayer.
Even though they're extremely small, viruses are too large to enter a cell by passive or active transport and thus must enter a host cell via
Phospholipid bilayer membranes are
*allow some to pass and blocks others*
Hypertension is a major disease associated with
lack of exercise and an unhealthy diet.