unit 1 biology voacb Flashcards
an organized way of using evidence to learn about the natural world
science
process of gathering information about events, or processes in a careful, orderly way
observation
information gathered from observations
data
logical interpretation based on prior knowledge or experience
inference
proposed scientific explanation for a set of observations
hypothesis
idea that life could arise from nonliving matter
spontaneous generation
only one variable is changed at a time
controlled experiment
variable that is deliberately changed
manipulated variable/ independent variable
variable that is observed and that changes in response to the manipulated variable
responding variable/ dependent variable
evidence from numerous investigations builds up, a particular hypothesis may become so well supported that scientist consider it a
theory
science that employs the scientific method to study living things
biology
smallest unit of an organism, that can be considered alive
cell
keeping conditions inside their bodies a constant
homeostasis
two different parents unite to form the first cell of the new organism
sexual reproduction
single parent produces offspring that are identical to itself
asexual reproduction
combination of chemical reactions through which an organism builds up or breaks down materials
metabolism
a signal to which an organism responds
stimuli
decimal system of measurement who units are based on certain physical standards and are scaled on multiples of 10
metric system
devices that produce magnified images of structures that are too small to see with the unaided eye
microscopes
allow light to pass through the specimen and use two lenses to form an image
compound light microscopes
use beams of electrons, rather than light to produce images
electron microscopes
group of cells, develops from the single original
cell culture
used to separate different cell parts
cell fractionation
