Quiz
Week 1 Homework (Screencasts/Review Quiz)
Perguntas do quiz (32)
1Many of the frogs in the pond near your house have died; their bodies are lying in the grass at the pond's edge. You begin to wonder why this is the case. You suggest that there may be a chemical in the pond that is responsible for the deaths. Which of the following statements is an example of an observation?
- AYou suggest that there may be a chemical in the pond that is responsible for the deaths.
- BYou decide to relocate some of the frogs to a clean water tank to see if they will survive.
- CMany of the frogs in the pond near your house have died; their bodies are lying in the grass at the pond's
- DYou begin to wonder why the frogs are dying.
2In science, a hypothesis
- AIs a final answer to a question
- BIs formulated solely by speculation
- CCan be proven by experimental results
- DIs the basis for making predictions
- Edoes not have to be testable.
3Many of the frogs in the pond near your house have died; their bodies are lying in the grass at the pond's edge. You begin to wonder why this is the case. You suggest that there may be a chemical in the pond that is responsible for the deaths. Which of the following statements is an example of an experiment?
- AYou decide to relocate some of the frogs to a clean water tank to see if they will survive.
- BYou suggest that there may be a chemical in the pond that is responsible for the deaths.
- CYou begin to wonder why the frogs are dying.
- DMany of the frogs in the pond near your house have died; their bodies are lying in the grass at the pond's edge.
4What is the purpose of using statistics to analyze data from an experiment?
- ATo predict the results of a future experiment
- BTo identify sources of error in the experiment
- CTo determine whether the experiment was conducted properly
- DTo determine whether differences observed between groups are meaningful
5On a line graph, which variable should be plotted on the x-axis?
- ADependent variable
- BControlled variable
- CIndependent variable
6Many of the frogs in the pond near your house have died; their bodies are lying in the grass at the pond's edge. You begin to wonder why this is the case. You suggest that there may be a chemical in the pond that is responsible for the deaths. Which of the following statements is an example of a hypothesis?
- AMany of the frogs in the pond near your house have died; their bodies are lying in the grass at the pond's edge.
- BYou suggest that there may be a chemical in the pond that is responsible for the deaths.
- CYou begin to wonder why the frogs are dying.
- DYou decide to relocate some of the frogs to a clean water tank to see if they will survive.
7An explanation that is supported by common-sense reasoning but cannot be tested experimentally is called a(n)
- APrediction
- BTheory
- CHypothesis
- DObservation
- ENone of the above
8An explanation supported by a large body of observations and experimentation is referred to as a(n):
- AInvestigation
- BSupposition
- CHypothesis
- DPrediction
- ETheory
9Many of the frogs in the pond near your house have died; their bodies are lying in the grass at the pond's edge. You begin to wonder why this is the case. You suggest that there may be a chemical in the pond that is responsible for the deaths. Which of the following statements is an example of a research question?
- AMany of the frogs in the pond near your house have died; their bodies are lying in the grass at the pond's edge.
- BYou decide to relocate some of the frogs to a clean water tank to see if they will survive.
- CYou suggest that there may be a chemical in the pond that is responsible for the deaths.
- DYou begin to wonder why the frogs are dying.
10The main purpose of any single experiment is to:
- Atest a prediction that is based on a hypothesis.
- Bprove unambiguously that a particular hypothesis is correct.
- Cobtain accurate quantitative measurements.
- Danswer as many questions as possible.
11Scientists, including biologists, use models to:
- Adescribe complex systems in a simplified way
- Bexplain how something works
- Cdevelop and test hypotheses
- Dall of these are possible uses of a model
12Suppose you are drawing a box-and-arrow model to explain your understanding of how a cell produces a certain protein. Your model needs to include the concept "DNA", since it is a key structural component of the process. Most likely, you will place the word DNA
- Ain the title of the model
- Bon a straight line linking the two boxes
- Con an arrow linking the boxes
- Din a box
13A cell:
- Ais composed of different chemical elements than nonliving things.
- Bis self-sufficient and does not need to obtain resources from its environment.
- Ccan be composed of many types of tissues.
- Dmay be a living organism in itself or a part of a more complex organism.
14The Second Law of Thermodynamics:
- Astates that living organisms must become more organized for the entropy of the universe to increase
- Bstates that matter cannot be created nor destroyed
- Cstates that living organisms must become more organized for the entropy of the universe to decrease
- Dequally applies to living and non-living things
- Estates that there is an increase in disorder in the universe over time
- Fonly applies to living organisms
- Gonly applies to the physical, non-living environment
15A bird uses its muscles to enable it to fly; however, each individual muscle itself is not capable of flight. The ability to fly is a property of the entire organism (the bird), not the individual parts that make up the bird. Flight, therefore, is an example of a(n) ______ property.
- Acomplex
- Bhierarchical
- Chomeostatic
- Demergent
16The first law of thermodynamics explains the observation(s) that:
- Awhen organisms use energy to do work, the energy does not "disappear", but is returned to the environment as heat.
- Ball living organisms must obtain energy from the environment
- Cwhen organisms use energy to do work, the used energy is "consumed and no longer exists
- Dliving organisms can use heat as a source of energy
- Eall living organisms, at some point, die
- Fthe entropy (disorder) of the universe is constantly increasing
17Entropy is a measure of the amount of __________ in a system.
- Agenetic information
- Bbiomass
- Cmatter
- Ddisorder
- Eenergy
18In biology, the word "community" refers to a:
- Agroup of organisms of the same species that interact with each other
- Bspecific type of ecosystem
- Cgroup of organisms of several different species
- Dgroup of organisms and their physical environment
- Egroup of organisms of the same species
19___________ can covert energy from sunlight into chemical energy (select all that apply)
- Amost plants
- Bmost animals
- Call living organisms
- Dfungi
- Eheterotrophs
- Fautotrophs
20The smallest unit of life is a(n):
- Acell
- BDNA molecule
- Corganelle
- Dpopulation
- Etissue
21Which one of the following is characteristic of both living organisms and non-living material?
- Athey obey the basic laws of chemistry and physics
- Bthe capacity to evolve
- Ccomplexity, with spatial organization on several levels
- Dthe ability to reproduce
- Ethe ability to change in response to the environment
22The second law of thermodynamics states that:
- Athere is an increase in disorder in the universe over time
- Bthe universe becomes more orderly over time
- Cthe conversion of energy from one form to another is 100% efficient
- Dmatter cannot be created or destroyed
- Eonly living organisms can create energy
23Source: HJ Cha et al, Evolutionarily Repurposed Networks Reveal the Well-Known Antifungal Drug Thiabendazole to Be a Novel Vascular Disrupting Agent, PLoS Biol 10(8): e1001379. Doi:10.1371/journal.pbio.1001379
A recent paper published in the journal PLOS Biology describes a study in which scientists tested the effect of thiabendazole (TBZ), a compound used for many years as an anti-fungal drug, on tumor growth in mice. Tumors typically begin as small clusters of cells that grow rapidly and uncontrollably into larger masses. In an experiment described in this paper, human tumor cells were implanted under the skin of mice in an area where the tumor growth could be observed visually. These mice are an experimental system that can be used to test the effects of TBZ on a tumor in a living organism. To be administered to a mouse, TBZ must be dissolved in a solvent called DMSO (dimethylsulfoxide) and injected.
In the experiment described in this paper, the scientists allowed the tumors to become established and reach a designated size. When the tumors were large enough, the mice were injected daily with 1 mg TBZ dissolved in DMSO, or injected with DMSO only, for 26 days. Tumor growth was monitored over time, and the tumor volume in mm3 was calculated. At the end of the experiment, the tumors were removed and weighed.
What is the null hypothesis (H0) in this study?- ATBZ inhibits tumor growth in humans.
- BTBZ inhibits tumor growth in mice.
- CTBZ acts on tumor cells to inhibit tumor growth.
- DTBZ does not affect tumor growth in mice.
24Source: HJ Cha et al, Evolutionarily Repurposed Networks Reveal the Well-Known Antifungal Drug Thiabendazole to Be a Novel Vascular Disrupting Agent, PLoS Biol 10(8): e1001379. Doi:10.1371/journal.pbio.1001379
A recent paper published in the journal PLOS Biology describes a study in which scientists tested the effect of thiabendazole (TBZ), a compound used for many years as an anti-fungal drug, on tumor growth in mice. Tumors typically begin as small clusters of cells that grow rapidly and uncontrollably into larger masses. In an experiment described in this paper, human tumor cells were implanted under the skin of mice in an area where the tumor growth could be observed visually. These mice are an experimental system that can be used to test the effects of TBZ on a tumor in a living organism. To be administered to a mouse, TBZ must be dissolved in a solvent called DMSO (dimethylsulfoxide) and injected.
In the experiment described in this paper, the scientists allowed the tumors to become established and reach a designated size. When the tumors were large enough, the mice were injected daily with 1 mg TBZ dissolved in DMSO, or injected with DMSO only, for 26 days. Tumor growth was monitored over time, and the tumor volume in mm3 was calculated. At the end of the experiment, the tumors were removed and weighed.
What is the alternate hypothesis (H1) in this study?- ATBZ does not affect tumor growth in humans.
- BTBZ acts on tumor cells to inhibit tumor growth.
- CTBZ inhibits tumor growth in humans.
- DTBZ does not affect tumor growth in mice.
- ETBZ inhibits tumor growth in mice.
25Source: HJ Cha et al, Evolutionarily Repurposed Networks Reveal the Well-Known Antifungal Drug Thiabendazole to Be a Novel Vascular Disrupting Agent, PLoS Biol 10(8): e1001379. Doi:10.1371/journal.pbio.1001379
A recent paper published in the journal PLOS Biology describes a study in which scientists tested the effect of thiabendazole (TBZ), a compound used for many years as an anti-fungal drug, on tumor growth in mice. Tumors typically begin as small clusters of cells that grow rapidly and uncontrollably into larger masses. In an experiment described in this paper, human tumor cells were implanted under the skin of mice in an area where the tumor growth could be observed visually. These mice are an experimental system that can be used to test the effects of TBZ on a tumor in a living organism. To be administered to a mouse, TBZ must be dissolved in a solvent called DMSO (dimethylsulfoxide) and injected.
In the experiment described in this paper, the scientists allowed the tumors to become established and reach a designated size. When the tumors were large enough, the mice were injected daily with 1 mg TBZ dissolved in DMSO, or injected with DMSO only, for 26 days. Tumor growth was monitored over time, and the tumor volume in mm3 was calculated. At the end of the experiment, the tumors were removed and weighed.
Select all that apply. How was tumor growth measured in this study?- Aas size of tumors in mm2
- Bas number of tumors per mouse
- Cas mass of the tumors in grams
- Das number of mice who died in the experiment
- Eas volume of the tumors in mm3
26Source: HJ Cha et al, Evolutionarily Repurposed Networks Reveal the Well-Known Antifungal Drug Thiabendazole to Be a Novel Vascular Disrupting Agent, PLoS Biol 10(8): e1001379. Doi:10.1371/journal.pbio.1001379
A recent paper published in the journal PLOS Biology describes a study in which scientists tested the effect of thiabendazole (TBZ), a compound used for many years as an anti-fungal drug, on tumor growth in mice. Tumors typically begin as small clusters of cells that grow rapidly and uncontrollably into larger masses. In an experiment described in this paper, human tumor cells were implanted under the skin of mice in an area where the tumor growth could be observed visually. These mice are an experimental system that can be used to test the effects of TBZ on a tumor in a living organism. To be administered to a mouse, TBZ must be dissolved in a solvent called DMSO (dimethylsulfoxide) and injected.
In the experiment described in this paper, the scientists allowed the tumors to become established and reach a designated size. When the tumors were large enough, the mice were injected daily with 1 mg TBZ dissolved in DMSO, or injected with DMSO only, for 26 days. Tumor growth was monitored over time, and the tumor volume in mm3 was calculated. At the end of the experiment, the tumors were removed and weighed.- AWater alone
- BNothing
- CTBZ dissolved in DMSO
- DDMSO alone
- ETBZ dissolved in water
27The left column in this graph is 0.47 units tall. What is 0.47?
- AThe weight in grams of a single control mouse.
- BThe weight in grams of the tumor excised from a single control mouse.
- CThe mean (average) weight of several control mice.
- DThe mean (average) weight of the tumors from several control mice.
28Select all that apply. What do the error bars in the graph tell you about how the experiment was conducted?
- ASeveral mice were used for the TBZ treatment and several mice served as control.
- BThe measurements were inaccurate due to human error.
- COne mouse was used for the TBZ treatment and one mouse served as control.
- DThe measurements were inaccurate due to imprecision of the measurement instruments.
- EThe experiment was not conducted properly.
29What claim is supported by the data in this graph?
- ATBZ prevents formation of tumors in mice.
- BTBZ has no effect on the rate of tumor growth in mice.
- CTBZ can be used to slow the rate of tumor growth in humans.
- DTBZ eliminates tumors in mice.
- ETBZ slows the rate of tumor growth in mice.
30The results of this experiment are represented with a line graph because:
- Athe data represent change in the dependent variable over time.
- Bthe data represent change in the independent variable over time.
- Cthere are two separate groups, a control and a treatment group.
31The differences between control and TBZ treatment are statistically significant. This means the results of this experiment:
- Asupport the null hypothesis (H0).
- Bsupport the alternate hypothesis (H1).
- Cprove the alternate hypothesis (H1).
- Dprove the null hypothesis (H0).
- Erefute the alternate hypothesis (H1).
32Select all that apply. Based on the results of this experiment, the researcher can:
- Aclaim that TBZ also slows down tumor growth in humans.
- Bhypothesize that TBZ directly works to slow down proliferation of tumor cells in mice.
- Cclaim that TBZ slows down tumor growth in mice.
- Dhypothesize that TBZ also slows down tumor growth in humans.
- Eclaim that TBZ directly works to slow down proliferation of tumor cells in mice.
Informações
- Descrição
- Quiz on Week 1 Homework , created by Blake Clarke on 05/09/2016.
- Autor
- Blake Clarke
- Idioma
- English
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- 100
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