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