How can we help?

You can also find more resources in our Help Center.

biology chapter one.

integrated science 10a (biology) chapter 1
STUDY
PLAY
biology
the study of life
organization
the high degree of order within an organism's internal and external parts and in it's interactions with the living world
cell
the smallest unit that can perform all of life's processes
unicellular
organisms made with only one cell
multicellular
organisms made of multiple cells
organs
structures that carry out specialized jobs within an organ system
tissues
groups of cells that have similar abilities that allow the organ to function
organelles
tiny structures that carry out functions necessary for the cell to stay alive
biological molecules
the chemical compounds that provide physical structure and that bring about movement, energy use, or other cell functions
homeostasis
the maintenance of a stable level of internal conditions even though the environmental conditions are constantly changing
metabolism
the sum of all the chemical reactions that take in and transform energy and materials from the environment
cell division
the formation of two new cells from an existing cell
developement
the process by which an organism become a mature adult
reproduction
the process in which organisms produce new organisms like themselves
gene
a short segment of DNA the contains the instructions for a single trait of an organism
domain
one of the three major subdivisions of all organisms
kingdoms
divide domains
ecology
the branch of biology that studies organisms interacting with each other and with the environment
ecosystems
communities of all living species and their physical environment
evolution
descent with modification
natural selection
"survival of the fittest"
adaptions
traits that improve one's ability to survive and reproduce
scientific method
an organized to learn how the natural world works
observation
the act of perceiving a natural occurrence that causes someone to pose a question
hypothesis
a proposed explaination for the way a particular aspect of the natural world functions
prediction
a statement that forecasts what would happen in a test situation if the hypothesis was true
experiment
used to test a hypothesis and it's predictions
control group
provides a normal standard against which the biologist can compare results of the experimental group
experimental group
identical to the control group except for one factor
independent variable
manipulated by the experimenter
dependent variable
manipulated by the independent variable
theory
a set of related hypothesis' that is confirmed to be true many times
peer review
when scientists who are already experts in the field anonymously read and critique a research paper
compound light microscope
a microscope that shines light through a specimen and has two lenses to magnify an image
eyepiece (ocular)
magnifies the image usually 10x
objective lens
enlarges the image of the specimen
stage
the platform that supports the slide holding the specimen;
light source
a light bulb that provides light for viewing the image
magnification
the increase of an object's apparent size
nosepiece
the structure that holds the set of objective lens
resolution
the power to show details clearly in an image
scanning electron microscope
a microscope that passes a beam of electrons over the specimen's surface
transmission electron microscope
transmits a beam of electrons through a very thinly sliced specimen
metric system
a decimal system and thus is base on powers of 10
base units
describe length, mass, time, and other qualities in the SI system