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Bio MidTerm Barclay Exam Questions with Detailed, (COMPLETE ANSWERS), 2024; 100% TRUSTED Complete, trusted solutions and explanations $7.99   Add to cart
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Bio MidTerm Barclay Exam Questions with Detailed, (COMPLETE ANSWERS), 2024; 100% TRUSTED Complete, trusted solutions and explanations
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Bio MidTerm Barclay Exam Questions with Detailed, (COMPLETE ANSWERS), 2024; 100% TRUSTED Complete, trusted solutions and explanations

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  • November 17, 2024
  • 12
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • Biology
  • Biology

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Bio MidTerm Barclay
Study online at https://quizlet.com/_f95kzv

1. An uncharged atom of boron has an atomic number 5
of 5 and an atomic mass of 11. How many electrons
does boron have?

2. In ocean acidification, dissolving CO2 gas lowers
________ the pH of the ocean.

3. Which of the following statements best describes a A compound con-
compound? tains two or more dif-
ferent elements in a
fixed ratio.

4. Which of the following trace elements needed by iodine
humans is commonly added to table salt?

5. The four most common elements in living organ- CHON
isms are

6. A buffer donates H+ ions
when conditions be-
come too basic and
accepts H+ ions
when conditions be-
come too acidic.

7. Which of the following is dependent on the ability the university of wa-
of water molecules to form hydrogen bonds with ter as a solvent
other molecules besides water?

8. A nutrition facts label from a fortified cereal states A half-cup of skim
that in a single serving of cereal there is 8% of the milk contains twice
percent daily value of the element phosphorous. as much phosphorus
The label also says that a single serving of cere- as a serving of cere-
al plus one-half cup of skim milk has 20% of the al
percent daily value of phosphorus. Which of the
following statements is false?

9. The temperature of evaporation is much higher Fewer hydrogen
for water than for alcohol. Without knowing more bonds form between
about the chemistry of alcohol, which of the follow- alcohol molecules.


, Bio MidTerm Barclay
Study online at https://quizlet.com/_f95kzv
ing is the most logical chemical explanation for this As a result, less heat
phenomenon? is needed for alcohol
molecules to break
away from solution
and enter the air.

10. Which of the following statements about radioac- The energy emit-
tive isotopes is true? ted by radioactive
isotopes can break
chemical bonds and
cause molecular
damage in cells.

11. The tendency of water molecules to stick together cohesion
is referred to as

12. The body uses atoms in different ways to ac- The bone contains
complish different tasks. For example, one portion calcium salts, which
of the body's calcium supply strengthens bones, are less reactive
whereas another portion combines with proteins to than the calcium
stimulate blood clotting after tissue injury. Which of ions found in the
the following statements provides the most logical blood.
chemical explanation of calcium's ability to per-
form such different functions?

13. What happens to an atom if the electrons in the The properties of the
outer shell are altered? atom change.

14. When full, the innermost electron shell of argon 2;8
contains ________ electrons, and the outermost
shell contains ________ electrons.

15. ________ are weak bonds that are not strong Hydrogen bonds
enough to hold atoms together to form molecules
but are strong enough to form bonds within and
around large molecules.

16. Medicines are often administered in pill form. In ionic bonds; salt
many cases, the active ingredient of the pill (the
drug) is joined to another substance by ________.

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