EVR 1001 EXAM 1 UPDATED ACTUAL
Questions And CORRECT Answers
1. The entire area of land that a river drains is called its __________. - CORRECT
ANSWERS watershed
2. Which one of the following describes a positive feedback loop? - CORRECT
ANSWERS Positive feedback loops are more common in natural systems altered by human actions.
3. If the pond above is chemically treated to raise the pH to 7.0 ________. - CORRECT
ANSWERS The pond is now pH neutral and it has more hydrogen ions than at pH 7.5
4.________ are composed of amino acids. - CORRECT ANSWERS Proteins
5. An example of a positive feedback loop ________. - CORRECT ANSWERS is melting arctic
snow exposing dark surfaces that heat up and cause further melting
6. Forming the cell walls of stems, leaves, and roots, what compound is the primary structural constituent
of plant tissues? - CORRECT ANSWERS Cellulose
7. Electrically charged atoms or combinations of atoms are called ________. - CORRECT
ANSWERS ions
8. How do organic compounds differ from inorganic compounds? - CORRECT
ANSWERS Organic compounds consist of carbon atoms joined by covalent bonds and may contain
other elements, such as nitrogen, oxygen, sulfur, and phosphorus. Inorganic compounds lack carbon-
carbon bonds.
9. Carbon has an atomic number of 6. If an uncharged carbon atom has a mass number of 14, which of the
following is true? - CORRECT ANSWERS This atom has 6 protons , 8 neutrons, and 6 electrons
,10. Could 235U (uranium-235) decay into an isotope of 239Np (neptunium-239)? - CORRECT
ANSWERS NO, bc as uranium decays, it well shed subatomic particles, not add them
11. Which of the statements below best describes energy? - CORRECT ANSWERS Energy
provides the ability to change the position, composition, or the temperature of matter
12. Which of the following are the reactants (ingredients) needed for photosynthesis to occur? -
CORRECT ANSWERS carbon dioxide , water, and sunlight
13. Which of the following best describes the role of autotrophs in ecosystems? - CORRECT
ANSWERS They produce their own organic molecules, which can be broken down for Energy
14. Which of the following is an example of potential energy? - CORRECT ANSWERS the energy
held in bonds between atoms
15. The transitional zone between ecosystems is called a(n)______. - CORRECT
ANSWERS ecotone
16. Ecosystems that rapidly convert solar energy to biomass __________. - CORRECT
ANSWERS are said to have high primary productivity
17. How do energy and matter move through an ecosystem? - CORRECT ANSWERS Energy
unidirectionally flows through an ecosystem, whereas matter generally cycles within an ecosystem
18. A(n) __________ is an example of an ecosystem with high primary productivity, while a __________
is an example of an ecosystem with low primary productivity. - CORRECT ANSWERS algal bed ;
desert
19. During the light reactions of photosynthesis, the solar energy absorbed by chlorophyll is used to
________. - CORRECT ANSWERS Both A and C
, 20. A leaf falls from a tree and lands on the ground. Through time, bugs and bacteria consume the leaf.
Which of the following statements regarding this scenario is true? - CORRECT ANSWERS The
nutrients from the leaf have been recycled and released back into the soil
21. Geographic Information Systems (GIS) is ________. - CORRECT ANSWERS helping
conservation biologists study habitats and study biodiversity
22. The greatest source of both nitrogen and phosphorus entering Chesapeake Bay is ________. -
CORRECT ANSWERS agriculture
23. The trophic level of "producers" includes ________. - CORRECT ANSWERS any organism
producing biomass directly from photosynthesis
24. Biological nitrogen fixation (nitrogen fixation that is performed by living organisms) is carried out by
________. - CORRECT ANSWERS various species of specialized Bacteria
25. Aquifers are ________. - CORRECT ANSWERS porous rock formations located underground
that store groundwater
26. The greatest human impact on the carbon cycle has been through ________. - CORRECT
ANSWERS combustion of fossil fuels
27. All of the following are approaches to reducing eutrophication except ________. - CORRECT
ANSWERS applying fertilizers to farmland just before heavy rains are predicted.
28. Plants release water vapor through their leaves; this process is called ________. - CORRECT
ANSWERS transpiration
29. Glass Lake, located in a valley in low forested mountains, for many decades of the 19th and early 20th
centuries was a favorite picnic, recreation, and fishing site for people in surrounding towns and farms.
However, in the middle of the 20th century, a trend began in which the privately-owned farms in the
Questions And CORRECT Answers
1. The entire area of land that a river drains is called its __________. - CORRECT
ANSWERS watershed
2. Which one of the following describes a positive feedback loop? - CORRECT
ANSWERS Positive feedback loops are more common in natural systems altered by human actions.
3. If the pond above is chemically treated to raise the pH to 7.0 ________. - CORRECT
ANSWERS The pond is now pH neutral and it has more hydrogen ions than at pH 7.5
4.________ are composed of amino acids. - CORRECT ANSWERS Proteins
5. An example of a positive feedback loop ________. - CORRECT ANSWERS is melting arctic
snow exposing dark surfaces that heat up and cause further melting
6. Forming the cell walls of stems, leaves, and roots, what compound is the primary structural constituent
of plant tissues? - CORRECT ANSWERS Cellulose
7. Electrically charged atoms or combinations of atoms are called ________. - CORRECT
ANSWERS ions
8. How do organic compounds differ from inorganic compounds? - CORRECT
ANSWERS Organic compounds consist of carbon atoms joined by covalent bonds and may contain
other elements, such as nitrogen, oxygen, sulfur, and phosphorus. Inorganic compounds lack carbon-
carbon bonds.
9. Carbon has an atomic number of 6. If an uncharged carbon atom has a mass number of 14, which of the
following is true? - CORRECT ANSWERS This atom has 6 protons , 8 neutrons, and 6 electrons
,10. Could 235U (uranium-235) decay into an isotope of 239Np (neptunium-239)? - CORRECT
ANSWERS NO, bc as uranium decays, it well shed subatomic particles, not add them
11. Which of the statements below best describes energy? - CORRECT ANSWERS Energy
provides the ability to change the position, composition, or the temperature of matter
12. Which of the following are the reactants (ingredients) needed for photosynthesis to occur? -
CORRECT ANSWERS carbon dioxide , water, and sunlight
13. Which of the following best describes the role of autotrophs in ecosystems? - CORRECT
ANSWERS They produce their own organic molecules, which can be broken down for Energy
14. Which of the following is an example of potential energy? - CORRECT ANSWERS the energy
held in bonds between atoms
15. The transitional zone between ecosystems is called a(n)______. - CORRECT
ANSWERS ecotone
16. Ecosystems that rapidly convert solar energy to biomass __________. - CORRECT
ANSWERS are said to have high primary productivity
17. How do energy and matter move through an ecosystem? - CORRECT ANSWERS Energy
unidirectionally flows through an ecosystem, whereas matter generally cycles within an ecosystem
18. A(n) __________ is an example of an ecosystem with high primary productivity, while a __________
is an example of an ecosystem with low primary productivity. - CORRECT ANSWERS algal bed ;
desert
19. During the light reactions of photosynthesis, the solar energy absorbed by chlorophyll is used to
________. - CORRECT ANSWERS Both A and C
, 20. A leaf falls from a tree and lands on the ground. Through time, bugs and bacteria consume the leaf.
Which of the following statements regarding this scenario is true? - CORRECT ANSWERS The
nutrients from the leaf have been recycled and released back into the soil
21. Geographic Information Systems (GIS) is ________. - CORRECT ANSWERS helping
conservation biologists study habitats and study biodiversity
22. The greatest source of both nitrogen and phosphorus entering Chesapeake Bay is ________. -
CORRECT ANSWERS agriculture
23. The trophic level of "producers" includes ________. - CORRECT ANSWERS any organism
producing biomass directly from photosynthesis
24. Biological nitrogen fixation (nitrogen fixation that is performed by living organisms) is carried out by
________. - CORRECT ANSWERS various species of specialized Bacteria
25. Aquifers are ________. - CORRECT ANSWERS porous rock formations located underground
that store groundwater
26. The greatest human impact on the carbon cycle has been through ________. - CORRECT
ANSWERS combustion of fossil fuels
27. All of the following are approaches to reducing eutrophication except ________. - CORRECT
ANSWERS applying fertilizers to farmland just before heavy rains are predicted.
28. Plants release water vapor through their leaves; this process is called ________. - CORRECT
ANSWERS transpiration
29. Glass Lake, located in a valley in low forested mountains, for many decades of the 19th and early 20th
centuries was a favorite picnic, recreation, and fishing site for people in surrounding towns and farms.
However, in the middle of the 20th century, a trend began in which the privately-owned farms in the
