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| Which of the following is not one of the three domains of life? |
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| Four of the five answers listed below are necessary characteristics for the life of an individual organism. Select the exception. |
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| the organism must be an example of diversity, different from all other life |
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| In nearly all cases, the one-way flow of energy through the biosphere starts with energy input from: |
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| Which of the following is the highest level of organization, encompassing all regions where life is found on earth? |
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| The instructions for growth and development are in |
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| Non-living things would not contain: |
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| Because lipids are _________ they are unable to dissolve in water. |
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| Which of the following is not a lipid? |
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| Correct d. acid group attached to a non-polar hydrocarbon chain |
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| serve as food reserves in many organisms |
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| From the following organic compounds, choose the monosaccharide. |
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| The three most common elements in the human body are: |
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| hydrogen, oxygen, and carbon |
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| Organic compounds are composed of __________ and at least one hydrogen atom. |
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| Cells acquire and use energy as they build and break apart organic molecules. This is called: |
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| Altering protein structure: |
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| Correct d. all of the above are true statements |
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| Correct e. all of the above |
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| There are _________ different amino acids used to build proteins in humans. |
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| Proteins lose the ability to perform their functions when |
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| their three dimensional structure is disrupted |
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| The pH scale is a relative measure of: |
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| hydrogen ion concentration |
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| When dissolved in water, a(n) ______ donates H+ ions and a(n) ______ accepts H+ ions. |
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| A(n) _______ is a chemical partnership between a weak acid or base and its salt, which helps to maintain pH. |
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| The pH of most of the human body's internal environment, including blood, is a range of _________. |
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| The scientific method has varying levels of certainty. Which of the following terms has the lowest level of certainty? |
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| c. the possible answer to the question asked in a single experiment |
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| Science only addresses that which is: |
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| Complete the following sentence. A control group is: |
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| Correct a. a standard against which experimental groups are compared. |
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| To eliminate the influence of variables during experimentation, one should: |
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| establish a control group |
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| Which of the following scientific names is written correctly? |
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| The most diverse and inclusive classification group in taxonomy is the: |
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| Members of which kingdom are usually multicellular producers? |
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| To which organism is Bufo americanus, the American toad, most closely related? |
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| Select the difference between bacteria and eukarya. |
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| Correct b. Eukaryotic cells have a true membrane-bound nucleus and bacteria do not |
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| A scientific name consists of which of the following? |
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| genus name and species designation |
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| Three of the four answers listed below are characteristics of water. Select the exception. |
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| Water is important to living organisms because of: |
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| of its cohesive properties |
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| What is formed when an atom loses or gains an electron? |
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| What kind of bond is formed whenever atoms share a pair of electrons? |
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| The bond in table salt (NaCl) is: |
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| Water is described as a polar molecule because it: |
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| Correct d. has chemical bonds that share electrons unequally |
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| Choose the molecule whose structure is a double strand. |
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| DNA and RNA are composed of subunits called: |
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| Nucleotides contain what kind of sugars? |
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| Correct e. A and C are correct |
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| The energy carrying molecule ATP is a type of: |
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| What is the maximum number of electrons that can occupy the first shell of an atom? |
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| Whether one atom will bond with another atom depends on the number and arrangement of: |
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| Which of the following statements are TRUE about radioactive isotopes? Select ALL true statements! |
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radioactive isotopes are atoms of an element that differ in the number of neutrons
Correctd. radioactive isotopes can be useful in science and medicine as tracers
Correcte. atoms of radioactive isotopes spontaneously decay at predictable rates |
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| Particles that are fundamental building blocks of all matter are |
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| A neutral atom has 10 protons. How many electrons does it have? |
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| Correct a. combination of two or more atoms. |
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