Chapter 1 tes-Biology
Scientists aim for the best understanding of the _______ not to _____ anything
1. natural world 2. "prove"
Three main parts to a compound microscope
1. A light source which illuminates the object being observed 2. A lens on the nosepiece magnifies the image of the object 3. A lens in the eyepiece further enlarges the image and projects the image into your eye.
A prepared slide is a ....
permanent slide which is encased in glass.
hypothesis
possible explanation for a set of observations or possible answer to a scientific question
molecular scale
proteins in the body global scale a scientist might study humans in terms of proteins in the body.
Difference between Asexual and sexual reproduction?
Asexual- same traits in offspring and parent sexual reproduction-offspring differ from parent in some ways.
What devices are used to observe biological specimen?
Thin glass plates/slides
organisms detect and respond to ____-from their environment
stimuli
A goal of science is to provide __________ for events in the natural world
testable explanations
evolve
to change over time
Systems and System Models
within the biosphere, all parts of system work together
Science is always
changing
DNA
genetic material that organisms inherit from their parents
inheritence=...
DNA
internal stimuli
comes from the inside of an organism.
scientific attitudes
curiosity, skepticism, open-mindness, and creativity
Theory-well-tested explanation that unifies a broad range of observations
enables scientists to make accurate predictions about new situations.
data
evidence; information gathered from observations
controlled experiment
experiment in which only one variable is changed
What is one of the greatest achievements of modern biology?
explaining how organisms inherit traits
multi-cellular organisms
grow through development response to the environment
single-celled organisms
growth is simply increased in size
linear patterns
include tendencies for organ systems to become more comply.
stability and change
living things that maintain a relatively stable internal environment a process known as homeostasis.
scientists use the ...
metric system
stimulus
a signal to which an organism responds
dependent variable
a variable (often denoted by y ) whose value depends on that of another.
science only works with ______ not super-natural phenomenas
natural world
science
organized way of gathering and analyzing evidence about the natural world
external stimuli
signal which comes from the outside of the organism.
cells
smallest unit of life, reproduce, are based off of genetic code and evolve, obtain and use materials and energy, respond to their environment.
Living things are mede up of...
cells
infrence
A logical interpretation based on prior logic and experience
bias
A particular preference or point of view that is personal, rather than scientific.
Energy and Matter
Flows, cycles, and conversion living things use material and energy
experimental group
In an experiment, the group that is exposed to the treatment, that is, to one version of the independent variable.
control group
In an experiment, the group that is not exposed to the treatment; contrasts with the experimental group and serves as a comparison for evaluating the effect of the treatment.
control group vs. experimental group
In an experiment, the group that is not exposed to the treatment; contrasts with the experimental group and serves as a comparison for evaluating the effect of the treatment.
cause and effect
Mechanism and explanation: science is a way of knowing facts
ex. of interactions that occur within a biological system
Predation, competition, and symbosis
observation
Process of noticing and describing events or process in a carefully, orderly way
sexual reproduction
Process of reproduction involving a single parent that results in offspring that are genetically identical to the parent
Scientific Method Steps
Question, Research, Hypothesis, Experiment, Analyze the Data, Conclusion
Metabolism
The combination of chemical reactions through which an organism builds up or breaks down materials
independent variable
The experimental factor that is manipulated; the variable whose effect is being studied.
pattern
The geometric or regular arrangement of something in a study area.
biology
The study of life
