Biology Chap 1
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What are the steps of the Scientific Method?
- 1) Making Observation
- 2) Formulating a Hypothesis
- 3) Performing Experiments and Making Observations
- 4) Coming to a Conclusion
occurs whenever a person uses creative thinking to combine isolated facts into a cohesive whole
explanation based on existing knowledge
a series of procedures to test a hypothesis
variable in an experiment that is deliberately changed
group that is exposed to the experimental variable
group NOT exposed to experimental variable
a representation of an actual object
results of an experiment or further observations
accepted explanations (concepts) for how the world works
5 basic theories of biology?
a plant that has root nodules where bacteria convert atmospheric nitrogen to a form plants such as winter wheat can use
What are the levels of biological organization?
- organ system
the fundamental unit of living things
the smallest portions of an element
What is the cell theory?
states that cells, the fundamental units of life, come from other cells as reproduction of cells and the organism occurs
the capacity to do work
carries out chemical reactions
allows plants to capture solar energy and produce nutrients that sustain all organisms
what is the gene theory?
genes are hereditary units composed of DNA
Theory of Homeostasis?
states that organisms and cells have mechanisms that keep the internal environment relatively constant
Theory of ecosystems?
states that organisms form units in which they interact with the biotic (living) and abiotic (nonliving) components of the environment
What are the levels of classification?
Theory of evolution?
states that all species (living or extinct) can trace their ancestry to a common source
depicts the pattern of descent by way of common ancestors
the classification of organism according to the evolutionary relationships
What are the three domains?
organisms without a membrane-bounded nucleus
organisms with a membrane-bounded nucleus
What are the four major groups in the Eurkarya domain?
unicellular to multicelluar organisms with various modes of nutrition
two part scientific name used to classify an organism
Theory of evolution?
states that modifications are introduced as evolution occurs, and if these modifications assist adaptions, they become more common through natural selection
brings about adaption to the environment
humans are the selective agent and not the environment
What are some characteristics shared by all living organisms?
- life is organized
- life uses materials and energy
- life reproduces
- life is homeostatic
- life responds to stimuli
- life forms ecosystems
- life evolves
What would you like to do?
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