Biology 1013 Midterm Exam – Questions With
Appropriate Solutions
Save Groups
Terms in this set (165)
HETEROTROPHS Organisms, such as humans and other animals, that
obtain energy by eating organic molecules
produced by other organisms.
Autotroph Organisms, such as plants, algae, and certain
bacteria, that capture the energy of sunlight by
photosynthesis.
[CHLOROPLAST] The organelle in plant and algal cells where
photosynthesis occurs.
PHOTOSYNTHESIS The process by which plants and other autotrophs
use the energy of sunlight to make energy-rich
molecules using carbon dioxide and water.
Describe the difference between Heterotrophs gain energy by consuming other
heterotrophs and autotrophs and organisms. Examples of heterotrophs include
provide an example of each. animals, fungi, and some protists. Autotrophs gain
energy by converting environmental energy (mostly
energy from the Sun) into chemical energy. Examples
of autotrophs include plants, some bacteria, and
some protists.
What are the main types of Plants, algae, some protists, some bacteria.
photosynthetic autotrophs?
,Why is the fact that photosynthetic Carbon dioxide, or CO2, is a greenhouse gas that is
organisms, including algae, use considered an environmental pollutant, partially
carbon dioxide (along with water and responsible for global warming. By taking carbon
some nutrients) to convert sunlight to dioxide out of the atmosphere to use in
usable energy important in terms of photosynthesis, algae remove this pollutant from the
the environment? environment and lessen its effect on global warming.
List some benefits of photosynthetic Some potential answers:They remove carbon dioxide
organisms for the biosphere as a from the atmosphere.A byproduct of photosynthesis
whole. (Remember that the biosphere is oxygen, which almost every living organism needs
consists of all ecosystems on Earth.) to survive.They are a main source of food, or energy,
for many organisms.They are the initial food source
for all heterotrophs.
Based on your knowledge of cyanobacteria
prokaryotic and eukaryotic organisms,
which of the following organisms does
NOT contain chloroplasts?
Which of these is a product of Oxygen
photosynthesis?
What do autotrophs provide A. energy
heterotrophs? B. protein
C. oils
[D. More than one of the answers are correct.]
E. None of the answers is correct.
chemical energy potential energy stored in the bonds of biological
molecules
heat The kinetic energy generated by the movements of
molecules or atoms
potential energy stored energy
Energy the ability to do work
, kinetic energy energy of motion
conservation of energy a principle stating that energy cannot be created or
destroyed, but can be altered from one form to
another.
light energy the energy of the electromagnetic spectrum of
radiation that is visible to the human eye
Imagine that you had to turn the light When you turn the light on, you will activate energy
on, go upstairs to get your jacket, and from the visible electromagnetic spectrum. As you
take it downstairs. Describe all of the go upstairs and get your jacket, you will use the
transformations of energy that take stored potential energy in the form of chemical
place for this to happen. Make sure to energy that you built up from the day's meals. The
include the following forms of energy: energy in the chemical bonds of the food we eat can
chemical, kinetic, potential, light, and be broken down and used as the kinetic energy
heat. required for you to walk up and down the stairs. Of
course, walking up and down stairs is hard work, so
some of the energy will be lost to the environment as
heat. (Perhaps you got a little hot and winded
running up the stairs to get your jacket.)
You might say that the sandwich you It is unlikely that all of the chemical energy (or
had for lunch powered your walk up potential energy) that was stored in the sandwich
and down the stairs to get your jacket. was converted to kinetic energy of movement. It is
Was all of the potential energy in that likely that some of the energy provided by the
sandwich converted to the kinetic sandwich was lost to the environment through heat
energy of your legs moving? Why or because of the inefficient nature of the conversion of
why not? Discuss your answer in terms one type of energy to another.
of energy conversion efficiency.
How can we say that some energy is The term lost in this context means that the energy
lost to the environment as heat if was not used in the intended process but instead
energy is neither created nor entered into a different process. For example, during
destroyed? the conversion of gasoline from chemical energy to
heat energy, which powers the movement of engine
pistons, some of the heat energy escapes out of the
engine block and into the surrounding environment.
The heat that escapes into the environment cannot
power the pistons, so we say that it is lost.
Appropriate Solutions
Save Groups
Terms in this set (165)
HETEROTROPHS Organisms, such as humans and other animals, that
obtain energy by eating organic molecules
produced by other organisms.
Autotroph Organisms, such as plants, algae, and certain
bacteria, that capture the energy of sunlight by
photosynthesis.
[CHLOROPLAST] The organelle in plant and algal cells where
photosynthesis occurs.
PHOTOSYNTHESIS The process by which plants and other autotrophs
use the energy of sunlight to make energy-rich
molecules using carbon dioxide and water.
Describe the difference between Heterotrophs gain energy by consuming other
heterotrophs and autotrophs and organisms. Examples of heterotrophs include
provide an example of each. animals, fungi, and some protists. Autotrophs gain
energy by converting environmental energy (mostly
energy from the Sun) into chemical energy. Examples
of autotrophs include plants, some bacteria, and
some protists.
What are the main types of Plants, algae, some protists, some bacteria.
photosynthetic autotrophs?
,Why is the fact that photosynthetic Carbon dioxide, or CO2, is a greenhouse gas that is
organisms, including algae, use considered an environmental pollutant, partially
carbon dioxide (along with water and responsible for global warming. By taking carbon
some nutrients) to convert sunlight to dioxide out of the atmosphere to use in
usable energy important in terms of photosynthesis, algae remove this pollutant from the
the environment? environment and lessen its effect on global warming.
List some benefits of photosynthetic Some potential answers:They remove carbon dioxide
organisms for the biosphere as a from the atmosphere.A byproduct of photosynthesis
whole. (Remember that the biosphere is oxygen, which almost every living organism needs
consists of all ecosystems on Earth.) to survive.They are a main source of food, or energy,
for many organisms.They are the initial food source
for all heterotrophs.
Based on your knowledge of cyanobacteria
prokaryotic and eukaryotic organisms,
which of the following organisms does
NOT contain chloroplasts?
Which of these is a product of Oxygen
photosynthesis?
What do autotrophs provide A. energy
heterotrophs? B. protein
C. oils
[D. More than one of the answers are correct.]
E. None of the answers is correct.
chemical energy potential energy stored in the bonds of biological
molecules
heat The kinetic energy generated by the movements of
molecules or atoms
potential energy stored energy
Energy the ability to do work
, kinetic energy energy of motion
conservation of energy a principle stating that energy cannot be created or
destroyed, but can be altered from one form to
another.
light energy the energy of the electromagnetic spectrum of
radiation that is visible to the human eye
Imagine that you had to turn the light When you turn the light on, you will activate energy
on, go upstairs to get your jacket, and from the visible electromagnetic spectrum. As you
take it downstairs. Describe all of the go upstairs and get your jacket, you will use the
transformations of energy that take stored potential energy in the form of chemical
place for this to happen. Make sure to energy that you built up from the day's meals. The
include the following forms of energy: energy in the chemical bonds of the food we eat can
chemical, kinetic, potential, light, and be broken down and used as the kinetic energy
heat. required for you to walk up and down the stairs. Of
course, walking up and down stairs is hard work, so
some of the energy will be lost to the environment as
heat. (Perhaps you got a little hot and winded
running up the stairs to get your jacket.)
You might say that the sandwich you It is unlikely that all of the chemical energy (or
had for lunch powered your walk up potential energy) that was stored in the sandwich
and down the stairs to get your jacket. was converted to kinetic energy of movement. It is
Was all of the potential energy in that likely that some of the energy provided by the
sandwich converted to the kinetic sandwich was lost to the environment through heat
energy of your legs moving? Why or because of the inefficient nature of the conversion of
why not? Discuss your answer in terms one type of energy to another.
of energy conversion efficiency.
How can we say that some energy is The term lost in this context means that the energy
lost to the environment as heat if was not used in the intended process but instead
energy is neither created nor entered into a different process. For example, during
destroyed? the conversion of gasoline from chemical energy to
heat energy, which powers the movement of engine
pistons, some of the heat energy escapes out of the
engine block and into the surrounding environment.
The heat that escapes into the environment cannot
power the pistons, so we say that it is lost.
