Living Things - characteristics and needs
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24 Terms
organism
A living thing
cell
Basic unit of life
unicellular
Made of a single cell
multicellular
Made up of more than one cell.
stimulus
A change in an organism's surroundings that causes the organism to react
response
An action taken or change in behavior due to a stimulus.
development
The process of becoming more complex.
asexual reproduction
A reproductive process that involves only one parent and produces offspring that are identical to the parent.
sexual reproduction
A reproductive process that involves two parents that combine their genetic material to produce a new organism that differs from both parents
autotroph
An organism that makes its own food
heterotroph
An organism that cannot make its own food, and thus must ingest other organisms.
homeostasis
An organism's ability to keep the proper conditions inside no matter what is going on outside the organism. Example: keeping the same body temperature and water level even if you are standing outside in the cold rain.
growth
The process of becoming larger.
respiration
The process by which cells combine oxygen with simple food molecules to release the energy they contain
grows and develops
The 6 characteristics of living things are: made of cells, made of the chemicals of life, uses energy, reproduces, responds and ________________
living space
The 4 needs of living things are: homeostasis, food, water and ______________
carbohydrates
The chemicals that all living things are made of are: proteins, lipids, water, nucleic acids and _________
reproduces
The 6 characteristics of living things are: made of cells, made of the chemicals of life, uses energy, responds, grows and develops, and ________________
proteins
The chemicals that all living things are made of are: lipids, water, carbohydrates, nucleic acids and _________
food
The 4 needs of living things are: homeostasis, water, living space, and ______________
water
Most abundant chemical of life. Needed for chemical reactions.
energy
Carbohydrates are the main source of _____________ for an organism.
proteins and lipids
2 chemicals of life that are used to build new cell parts.
nucleic acid
Chemical of life that is the genetic material for the cell - usually DNA.
