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levels of organization
Cellular level - atoms, molecules, macromolecules, organelles, cells
Organismal level - tissues, organs, organ system, organism
Population level - population, species, community, ecosystem
All the living and nonliving components of a particular environment
all populations of different species that coexist and interact (in time and space)
all organisms of the same species that coexist and interact (in time and space)
a living entity that can act or function independently
a group of interconnected organs that have a specific collective function
a structure composed of two or more tissue types that work together to carry out a particular function
a distinct area of an organ formed from a mass of similar cells and cell products
the smallest level at which all functions of life can be carried out by organisms
structures in cells that carry out distinct functions
a particle composed of at least two bonded atoms that has a unique set of physical and chemical properties
atom (hydrogen, carbon, nitrogen)
the smallest unit of matter that retains the properties of an element
characteristics of life
- 1.- Cellular organization: All living organisms are composed of one or more cells.
- 2.- Metabolism: All living organisms use energy.
- 3.- Homeostasis: All living organisms maintain stable internal conditions.
- 4.- Growth and Reproduction: All living organisms grow and reproduce.
- 5.- Heredity: All living organisms use DNA to transmit hereditary information to offspring.
genetic change in a species over time
the differential reproduction of genotypes caused by factors in the environment
observes phenomena and draws conclusions from the observations (observe phenomena; classify)
sets out to see how one factor affects other factors (manipulate one factor; observe the response)
An experiment that isolates the effect of one variable on a system by holding constant all variables but the one under observation
a group of subjects closely resembling the treatment group in many demographic variables but not receiving the active medication or factor under study and thereby serving as a comparison group
the group in an experiment that receives the variable being tested
the experimental group is compared to a control group, which does not receive the test variable.
what is going on
question raised based on the observation
a proposal that might be true (an educated guess)
test of a hypothesis
results & conclusion
results/conclusions based on the hypothesis
a well tested hypothesis supported by a great deal of evidence
Describe 5 of the characteristics of life. Explain and give an example for each of the characteristics.
Describe 12 levels of biological organizations using specific examples and functions of those examples
Compare and contrast discovery science and hypothesis-based science. Explain an example of each.
What are the steps of the scientific method? Describe each step and what
happens in them. Use an example to help explain the steps.
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