Question 1

This figure shows graphed medical research results from a study on a new vaccine. The research was done in an effort to determine if a new vaccine would be effective at preventing potentially dangerous rotavirus infections in infants. Green data bars represent occurrence of infant cases that had normal rotavirus strains that aren't critically dangerous. Blue data bars represent occurrence of infant cases that had more dangerous rotavirus strains that can hospitalize or lead to fatality of infants

-In the graph,interpret the data that are shown regarding the response of a large number of infants to vaccination from dangerous rotavirus infection.Which of the hypotheses is NOT supported by these data results?

Accepted Answer

A)   The new vaccine is ineffective in protecting infants from any rotavirus infection.
B)   The high dose of the new vaccine does not offer any stronger protection from any rotavirus infection than the medium dose.
C)   The low dose of the vaccine reduces incidence of illness from any rotavirus in general, and also severe rotavirus.
D)   Hypotheses about the vaccine doses can't be evaluated, because the placebo group is biased, with high incidence of illness in those infants.
E)   Medium and high doses of the vaccine are more effective at reducing severe rotavirus illnesses than reducing any rotavirus.F) A) and D)
G) C) and D)

Question 2

The smallest scale of biological organization is represented by each organelle.

Accepted Answer

A) True 
 B)False

Question 3

Scientific inquiry in biology is linked in a concept map with two sets of understanding researchers might pursue in experiments.Which of these is a good example of why concepts are linked between what is studied and how it might be studied?

Accepted Answer

A)   A newly identified bacterium in African soils is found to promote plant growth that a researcher will study in crop production.
B)   All of the answer choices are correct.
C)   A research physician hypothesizes that a new skin therapy will result in healthier skin tissues for healing.
D)   Environmental changes over recent decades have led to studies of whether specific plants and animals can adapt to the changes.E) A) and B)
F) All of the above

Question 4

A theory differs from a hypothesis in that a theory

Accepted Answer

A)   has predictive power for similar phenomena that haven't been observed yet.
B)   ties together many existing observations.
C)   has more supportive research evidence than a hypothesis.
D)   is broader in scope than a hypothesis.
E)   All of the answer choices are correct.F) All of the above
G) B) and E)

Question 5

Darwin observed an orchid flower with petals arranged in very long,thin tubes,rather than broad and flat,as we might commonly see in other common flowers.What is the advantage to the orchid having an 11-inch long nectary tube arrangement of the petals?

Accepted Answer

A)   The long tube can trap insects as a source of nutrients.
B)   The flower can collect more sunlight for photosynthesis.
C)   The flower can produce nectar more easily spread over a larger area to attract more pollinators.
D)   The flower can only be pollinated by a specifically adapted pollinator, reducing cross-fertilization among orchid species.
E)   The flower nectary tube can collect more rainwater to maintain health of the flower.F) A) and B)
G) A) and C)

Question 6

This figure shows graphed medical research results from a study on a new vaccine. The research was done in an effort to determine if a new vaccine would be effective at preventing potentially dangerous rotavirus infections in infants. Green data bars represent occurrence of infant cases that had normal rotavirus strains that aren't critically dangerous. Blue data bars represent occurrence of infant cases that had more dangerous rotavirus strains that can hospitalize or lead to fatality of infants

-In this experiment,if the people actually giving the placebo,low,medium or high vaccine doses did not know which dose they were administering,it was an example of a double-blind experiment.

Accepted Answer

A) True 
 B)False

Question 7

The leaf of a plant is

Accepted Answer

A)   an organ.
B)   a cell.
C)   a molecule.
D)   an organism.
E)   an organelle.F) A) and D)
G) A) and C)

Question 8

A golfer wants a new set of clubs to improve her game.In an experiment,she goes to the driving range and compares the distance she hits a bucket of golf balls with drivers of different materials in the head before making her purchase decision.In this simple experiment,the standardized variable is the

Accepted Answer

A)   angle the ball was hit by the head surface of the club.
B)   all of these except the type of material used to make the club.
C)   type of material used to make the golf ball.
D)   wind direction when the experiment took place.
E)   force generated by her swing, when hitting the ball.F) B) and C)
G) C) and E)

Question 9

In an experiment designed to determine if a fertilizer increased crop yield in tomato plants,the number of tomatoes produced by each plant
would be the dependent variable.

Accepted Answer

A) True 
 B)False

Question 10

In an experiment,which of the following is not generally a true statement?

Accepted Answer

A)   The larger the sample size the more meaningful the results.
B)   It is important to standardize aspects of an experiment that might affect the outcome, other than the independent variable.
C)   Without the proper control an experiment is not valid.
D)   The smaller the sample size the more meaningful the results.
E)   None of the answer choices are correct.F) C) and D)
G) C) and E)

Question 11

Homeostasis means that

Accepted Answer

A)   conditions inside a cell or organism remain within a constant range.
B)   environmental conditions are held constant and do not change.
C)   cells have enough water.
D)   a population changes over time.
E)   all organisms require an energy source.F) B) and C)
G) A) and B)

Question 12

What did Charles Darwin propose after observing the 11-inch long nectaries of the Angraecum sesquipedale orchid in Madagascar?

Accepted Answer

A)   the presence of very small bees that can fit into a long nectar tube
B)   the existence of a pollinator moth with a proboscis of 10-11 inches
C)   that the orchid was an evolutionary dead end and could no longer reproduce
D)   that the orchid must reproduce asexuallyE) A) and B)
F) A) and C)

Question 13

In an experimental procedure,the researcher has established multiple levels of a chemical,or amounts of light,or some other factor at the beginning of the experiment,in order to determine if and how much the biological system responds.The manipulated factor at varying levels is the

Accepted Answer

A)   control group.
B)   Both control group and standardized variable are correct.
C)   dependent variable.
D)   standardized variable.
E)   independent variable.F) B) and D)
G) B) and C)

Question 14

An inert substance (such as sugar,water or saline solution) that resembles the dosage treatments (is injected or drank or given in pills the same way) given to experimental groups for testing a new medicine is

Accepted Answer

A)   a placebo.
B)   an independent variable.
C)   a standardized variable.
D)   never used in an experiment.E) A) and D)
F) All of the above

Question 15

A structure,such as a flower in plants,or a liver in animals,consisting of tissues organized to carry out a specific function is a(an)

Accepted Answer

A)   population.
B)   molecule.
C)   organelle.
D)   cell.
E)   organ.F) B) and C)
G) B) and D)

Question 16

Which of the following would not be a "control" in an experimental procedure?

Accepted Answer

A)   a "zero-value" group
B)   an experimental group
C)   a placebo group
D)   a known standard of comparison
E)   a normal groupF) A) and B)
G) A) and C)

Question 17

If your physician determines that you are ill because of a virus infection,the virus is not yet considered an organism.Viruses don't have cell membranes,organelles,nor carry out vital life functions,though they do have a form of DNA (or similar RNA) .A researcher proposing to categorize viruses in the tree of life would need to

Accepted Answer

A)   remember that the scientific method will prevent any changes to the current taxonomy and tree of life.
B)   apply his/her proposal to any newly discovered virus, since others aren't currently considered organisms.
C)   propose that relationship to other organisms as a new hypothesis, and test viruses for shared life characteristics.
D)   establish any virus as a control group for experimentation with established domains of organisms.E) None of the above
F) All of the above

Question 18

Which of these is not a required characteristic of life?

Accepted Answer

A)   structural organization
B)   homeostasis
C)   evolution
D)   energy use
E)   movementF) A) and B)
G) A) and C)

Question 19

As part of observation in your scientific method,you discover that your strawberry plants reproduce by growing fruits that distribute seeds.This demonstrates that they reproduce by

Accepted Answer

A)   development and adaptation.
B)   development and maturation.
C)   asexual reproduction.
D)   sexual reproduction.E) B) and C)
F) A) and B)

Question 20

All ecosystems

Accepted Answer

A)   need a continuous outside energy source.
B)   consist of only living organisms.
C)   are entirely self-sufficient.
D)   stay exactly the same once mature.
E)   None of the answer choices are correct.F) C) and E)
G) None of the above

Exam 1: The Scientific Study of Life

Which of the following would not be a "control" in an experimental procedure?

Correct Answer
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The smallest scale of biological organization is represented by each organelle.

Correct Answer
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Darwin observed an orchid flower with petals arranged in very long,thin tubes,rather than broad and flat,as we might commonly see in other common flowers.What is the advantage to the orchid having an 11-inch long nectary tube arrangement of the petals?

Correct Answer
verified

Correct Answer
verified

Homeostasis means that

Correct Answer
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In an experiment designed to determine if a fertilizer increased crop yield in tomato plants,the number of tomatoes produced by each plant would be the dependent variable.

Correct Answer
verified

A structure,such as a flower in plants,or a liver in animals,consisting of tissues organized to carry out a specific function is a(an)

Correct Answer
verified

The leaf of a plant is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In an experiment,which of the following is not generally a true statement?

Correct Answer
verified

A theory differs from a hypothesis in that a theory

Correct Answer
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Scientific inquiry in biology is linked in a concept map with two sets of understanding researchers might pursue in experiments.Which of these is a good example of why concepts are linked between what is studied and how it might be studied?

Correct Answer
verified

What did Charles Darwin propose after observing the 11-inch long nectaries of the Angraecum sesquipedale orchid in Madagascar?

Correct Answer
verified

An inert substance (such as sugar,water or saline solution) that resembles the dosage treatments (is injected or drank or given in pills the same way) given to experimental groups for testing a new medicine is

Correct Answer
verified

As part of observation in your scientific method,you discover that your strawberry plants reproduce by growing fruits that distribute seeds.This demonstrates that they reproduce by

Correct Answer
verified

In an experimental procedure,the researcher has established multiple levels of a chemical,or amounts of light,or some other factor at the beginning of the experiment,in order to determine if and how much the biological system responds.The manipulated factor at varying levels is the

Correct Answer
verified

All ecosystems

Correct Answer
verified

Correct Answer
verified

Which of these is not a required characteristic of life?

Correct Answer
verified

Exam 1: The Scientific Study of Life

Which of the following would not be a "control" in an experimental procedure?

Correct AnswerverifiedShow Answer

The smallest scale of biological organization is represented by each organelle.

Correct AnswerverifiedShow Answer

Darwin observed an orchid flower with petals arranged in very long,thin tubes,rather than broad and flat,as we might commonly see in other common flowers.What is the advantage to the orchid having an 11-inch long nectary tube arrangement of the petals?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Homeostasis means that

Correct AnswerverifiedShow Answer

In an experiment designed to determine if a fertilizer increased crop yield in tomato plants,the number of tomatoes produced by each plant would be the dependent variable.

Correct AnswerverifiedShow Answer

A structure,such as a flower in plants,or a liver in animals,consisting of tissues organized to carry out a specific function is a(an)

Correct AnswerverifiedShow Answer

The leaf of a plant is

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In an experiment,which of the following is not generally a true statement?

Correct AnswerverifiedShow Answer

A theory differs from a hypothesis in that a theory

Correct AnswerverifiedShow Answer

Scientific inquiry in biology is linked in a concept map with two sets of understanding researchers might pursue in experiments.Which of these is a good example of why concepts are linked between what is studied and how it might be studied?

Correct AnswerverifiedShow Answer

What did Charles Darwin propose after observing the 11-inch long nectaries of the Angraecum sesquipedale orchid in Madagascar?

Correct AnswerverifiedShow Answer

An inert substance (such as sugar,water or saline solution) that resembles the dosage treatments (is injected or drank or given in pills the same way) given to experimental groups for testing a new medicine is

Correct AnswerverifiedShow Answer

As part of observation in your scientific method,you discover that your strawberry plants reproduce by growing fruits that distribute seeds.This demonstrates that they reproduce by

Correct AnswerverifiedShow Answer

In an experimental procedure,the researcher has established multiple levels of a chemical,or amounts of light,or some other factor at the beginning of the experiment,in order to determine if and how much the biological system responds.The manipulated factor at varying levels is the

Correct AnswerverifiedShow Answer

All ecosystems

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of these is not a required characteristic of life?

Correct AnswerverifiedShow Answer

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