Campbell Essential Biology, 6th Edition,
Chapter 6 2025 PRACTICE TEST WITH
QUESTIONS AND GRADED ANSWERS
when there is enough oxygen reaching your cells to support their energy needs, ___________ is said to
be ______________ - CORRECT ANSWER-metabolism; aerobic
aerobic capacity - CORRECT ANSWER-the maximum rate at which O2 can be taken in and used by your
muscle cells (the most strenuous activity that your body can maintain aerobically)
photosynthesis - CORRECT ANSWER-the process where plants convert the energy of sunlight to the
chemical energy of sugars and other organic molecules
autotrophs - CORRECT ANSWER-organisms that make all their own organic matter from nutrients that
are completely inorganic; "self-feeders"
____________, _____________, __________, & __________ are four examples of the organic matter
made by autotrophs - CORRECT ANSWER-carbohydrates, lipids, proteins, & nucleic acids
heterotrophs - CORRECT ANSWER-organisms that cannot make organic molecules from inorganic ones
heterotrophs get their food by _____________ in order to _______________ - CORRECT ANSWER-
eating organic material; get nutrients and provide energy for life's processes
producers - CORRECT ANSWER-autotrophs
consumers - CORRECT ANSWER-heterotrophs
, when your muscle cells don't have sufficient O2 they _____________________ - CORRECT ANSWER-
switch to an "emergency mode"
when your muscle cells switch into "emergency mode" they __________________ - CORRECT ANSWER-
break down glucose very ineffectively and produce lactic acids as a by-product, causing impaired muscle
activity
the chemical ingredients for photosynthesis are _____________ & ____________ - CORRECT ANSWER-
carbon dioxide (CO2) & water (H2O)
carbon dioxide's role in photosynthesis - CORRECT ANSWER-it is a gas that passes from the air into a
plant via tiny pores
water's role in photosynthesis - CORRECT ANSWER-it is absorbed from the soil by the plant's roots
chloroplasts - CORRECT ANSWER-organelles inside leaf cells that use light energy to rearrange the atoms
of CO2 and H2O to produce sugars
glucose - CORRECT ANSWER-C6-H12-O6
oxygen gas (O2) - CORRECT ANSWER-a by-product of photosynthesis that is released through pores into
the atmosphere
energy flows through the ecosystem by: - CORRECT ANSWER-entering as sunlight and exiting as heat
cellular respiration is a(n) ________ process - CORRECT ANSWER-aerobic
cellular respiration - CORRECT ANSWER-the aerobic harvesting of chemical energy from organic fuel
molecules
Chapter 6 2025 PRACTICE TEST WITH
QUESTIONS AND GRADED ANSWERS
when there is enough oxygen reaching your cells to support their energy needs, ___________ is said to
be ______________ - CORRECT ANSWER-metabolism; aerobic
aerobic capacity - CORRECT ANSWER-the maximum rate at which O2 can be taken in and used by your
muscle cells (the most strenuous activity that your body can maintain aerobically)
photosynthesis - CORRECT ANSWER-the process where plants convert the energy of sunlight to the
chemical energy of sugars and other organic molecules
autotrophs - CORRECT ANSWER-organisms that make all their own organic matter from nutrients that
are completely inorganic; "self-feeders"
____________, _____________, __________, & __________ are four examples of the organic matter
made by autotrophs - CORRECT ANSWER-carbohydrates, lipids, proteins, & nucleic acids
heterotrophs - CORRECT ANSWER-organisms that cannot make organic molecules from inorganic ones
heterotrophs get their food by _____________ in order to _______________ - CORRECT ANSWER-
eating organic material; get nutrients and provide energy for life's processes
producers - CORRECT ANSWER-autotrophs
consumers - CORRECT ANSWER-heterotrophs
, when your muscle cells don't have sufficient O2 they _____________________ - CORRECT ANSWER-
switch to an "emergency mode"
when your muscle cells switch into "emergency mode" they __________________ - CORRECT ANSWER-
break down glucose very ineffectively and produce lactic acids as a by-product, causing impaired muscle
activity
the chemical ingredients for photosynthesis are _____________ & ____________ - CORRECT ANSWER-
carbon dioxide (CO2) & water (H2O)
carbon dioxide's role in photosynthesis - CORRECT ANSWER-it is a gas that passes from the air into a
plant via tiny pores
water's role in photosynthesis - CORRECT ANSWER-it is absorbed from the soil by the plant's roots
chloroplasts - CORRECT ANSWER-organelles inside leaf cells that use light energy to rearrange the atoms
of CO2 and H2O to produce sugars
glucose - CORRECT ANSWER-C6-H12-O6
oxygen gas (O2) - CORRECT ANSWER-a by-product of photosynthesis that is released through pores into
the atmosphere
energy flows through the ecosystem by: - CORRECT ANSWER-entering as sunlight and exiting as heat
cellular respiration is a(n) ________ process - CORRECT ANSWER-aerobic
cellular respiration - CORRECT ANSWER-the aerobic harvesting of chemical energy from organic fuel
molecules
