Science Life Science Written Exam
Questions Correctly Answered.
abiotic component - CORRECT ANSWER a nonliving component of an ecosystem, such as air, water, or
temperature
active transport - CORRECT ANSWER the movement of ions or molecules across a cell membrane into a
region of higher concentration, assisted by enzymes and requiring energy.
adaptation - CORRECT ANSWER a characteristic that improves an individual's ability to survive and
reproduce in a particular environment.
allele - CORRECT ANSWER one of multiple versions of the same gene; different form
amino acid - CORRECT ANSWER a molecule that is the building blocks of protein
ATP (adenosine triphosphate) - CORRECT ANSWER main energy source that cells use for most of their
work
biome - CORRECT ANSWER a group of ecosystems with similar climates and organisms
biotic component - CORRECT ANSWER The living factors of a biological community
carbon dioxide (CO2) - CORRECT ANSWER a molecule that is a product of cellular respiration and the
reactant in photosynthesis
cell membrane - CORRECT ANSWER thin, flexible barrier around a cell; regulates what enters and leaves
the cell
, cell wall - CORRECT ANSWER strong, supporting layer around the cell membrane; not found found in
animal cells
cellular respiration - CORRECT ANSWER process that transfers the energy stored in glucose into
molecules of ATP
cholorphyll - CORRECT ANSWER a green pigment present in most plant cells that gives plants their
characteristic green color; captures light energy for photosynthesis
chloroplast - CORRECT ANSWER organelle found in plant cells and eukaryotic algae that captures the
energy from sunlight and make it into food for the cell
chromosome - CORRECT ANSWER a linear or circular strand of DNA that contains the genetic material of
a cell, sometimes bonded to proteins
circulatory system (cardiovascular system) - CORRECT ANSWER permits blood to circulate and transport
nutrients, oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to
provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain
homeostasis (heart, arteries, capillaries, veins)
cladogram - CORRECT ANSWER a diagram that is based on patterns of shared, derived traits and that
shows the evolutionary relationships between groups of organisms
common ancestor - CORRECT ANSWER an ancestral species from which later species evolved
cytoplasm - CORRECT ANSWER the portion of the cell outside the nucleus; a jellylike fluid inside the cell
in which the organelles are suspended
decomposers - CORRECT ANSWER organisms that break down wastes and dead organisms and return
raw materials to the environment
diffusion - CORRECT ANSWER the process by which molecules move from an area of higher
concentration to an area of lower concentration
Questions Correctly Answered.
abiotic component - CORRECT ANSWER a nonliving component of an ecosystem, such as air, water, or
temperature
active transport - CORRECT ANSWER the movement of ions or molecules across a cell membrane into a
region of higher concentration, assisted by enzymes and requiring energy.
adaptation - CORRECT ANSWER a characteristic that improves an individual's ability to survive and
reproduce in a particular environment.
allele - CORRECT ANSWER one of multiple versions of the same gene; different form
amino acid - CORRECT ANSWER a molecule that is the building blocks of protein
ATP (adenosine triphosphate) - CORRECT ANSWER main energy source that cells use for most of their
work
biome - CORRECT ANSWER a group of ecosystems with similar climates and organisms
biotic component - CORRECT ANSWER The living factors of a biological community
carbon dioxide (CO2) - CORRECT ANSWER a molecule that is a product of cellular respiration and the
reactant in photosynthesis
cell membrane - CORRECT ANSWER thin, flexible barrier around a cell; regulates what enters and leaves
the cell
, cell wall - CORRECT ANSWER strong, supporting layer around the cell membrane; not found found in
animal cells
cellular respiration - CORRECT ANSWER process that transfers the energy stored in glucose into
molecules of ATP
cholorphyll - CORRECT ANSWER a green pigment present in most plant cells that gives plants their
characteristic green color; captures light energy for photosynthesis
chloroplast - CORRECT ANSWER organelle found in plant cells and eukaryotic algae that captures the
energy from sunlight and make it into food for the cell
chromosome - CORRECT ANSWER a linear or circular strand of DNA that contains the genetic material of
a cell, sometimes bonded to proteins
circulatory system (cardiovascular system) - CORRECT ANSWER permits blood to circulate and transport
nutrients, oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to
provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain
homeostasis (heart, arteries, capillaries, veins)
cladogram - CORRECT ANSWER a diagram that is based on patterns of shared, derived traits and that
shows the evolutionary relationships between groups of organisms
common ancestor - CORRECT ANSWER an ancestral species from which later species evolved
cytoplasm - CORRECT ANSWER the portion of the cell outside the nucleus; a jellylike fluid inside the cell
in which the organelles are suspended
decomposers - CORRECT ANSWER organisms that break down wastes and dead organisms and return
raw materials to the environment
diffusion - CORRECT ANSWER the process by which molecules move from an area of higher
concentration to an area of lower concentration
