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29 terms

Biology Chapter 1

Mr.Brannan's Biology 1 Honors Chapter 1 Vocab
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asexual reproduction
production of offspring that doesn't involve union of gametes
autotroph
organism that uses energy to synthesize organic molecules from inorganic substances
biology
the science that studies living organisms
differentiation
process which cells of multicellular individuals become specialized during development
DNA
hereditary info in form of large molecule, deoxyribonucleic acid
evolution
all changes that have formed life on Earth from earliest beginning to diversity that characterizes it today
gene
segment of DNA, contains coding for polypeptide or protein; unit of hereditary info
heterotroph
organism that obtains organic food molecules by eating organisms or their by-products
homeostasis
stable internal conditions of a living thing
multicellular organism
living thing, consists of more than one cell
natural selection
process which organisms w/ favorable variations reproduce at higher rates than those w/o such variations
organism
an individual animal, plant, or single-celled life form.
photosynthesis
conversion of light energy into chemical energy stored in organic compounds
sexual reproduction
production of offspring from combination of genetic material from two parent organisms
unicellular organism
living thing composed of one cell
development
process which an organism grows
metabolism
sum of all chemical processes in living things
control group
in experiment a group or individual that serves as a standard of comparison w/ another group or individual to which it is identical except for one factor
controlled experiment
test of variables using a comparison of a control group w/ an experimental group
dependent variable
responding variable in an experiment
experiment
a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact
experimental group
subject that receives the independent variable
hypothesis
statement that can be tested experimentally
independent variable
an experimentally manipulated variable
inference
an assumption based on your observations. cannot be seen directly
observation
something you can actually see, feel, hear, taste or smell. use senses directly.
prediction
a thing predicted; a forecast
sampling
test small group, assume it's true for everything
theory
broad and comprehensive statement of what is believed to be true, supported by considerable experimental evidence resulting or many tests of related hypothesis