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Chapter 1: A View of Life
Essentials of Biology 2nd edition
43
Biology
Undergraduate 1
09/02/2012

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Term
Common characteristics of living organisms
Definition
Organized, Acquire Materials & Energy, Respond, Reproduce & Develop, Have adaptations
Term
How is taxonomy used to classify living organisms?
Definition
It classifies organisms according to their presumed evolutionary relationships. (As more is learned about evolutionary relationships-taxonomy changes)
Term
Explain the categories of classification and properly use binomial nomenclature
Definition
LEAST to MOST inclusive: Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain
Term
Explain the process of natural selection as a driving force for evolution
Definition
See notes
Term
How is the biosphere organized?
Definition
Organisms belong to a population. The population within a community interact themselves & with the physical environment forming an ecosystem.
Term
Outline the scientific method
Definition
Observations & questions, Hypothesis, experiments/Further observations, Conclusion (Supported or not)
Term
The scientific method
Definition
Observations & Questions, Hypothesis, Experiment/Observe, Conclusion
Term
Observation
Definition
Step in the scientific method by which data are collected before a conclusion is drawn
Term
Hypothesis
Definition
Established by reasoning after consideration of available evidence it can be tested by obtaining more data, often by experimentation
Term
Experiment
Definition
A series of actions undertaken to collect data with which to test a hypothesis
Term
Dependent variable
Definition
(Response variable) Variable that you observe & measure (Ex. plant survival)
Term
Independent variable
Definition
Variable that scientist controls (Ex. availability of water)
Term
Categorical data
Definition
Data that can be divided into groups (i.e. sex, educational level, age)
Term
Binomial data
Definition
Two outcomes to an experiment (i.e. pass/fail, yes/no)
Term
Conclusion
Definition
Statement made following an experiment as whether or not the results support the hypothesis
Term
Peer review
Definition
scientific peer reviews require all new scientific theories, discoveries, ideas, and implications, to be scrutinized and critiqued by expert scientists before they become widely accepted.
Term
Scientific theory
Definition
Concept supported by a broad range of observations, experiments, and data
Term
Five common characteristics of living organisms
Definition
Organized, Acquire Materials & Energy, Respond, Reproduce & Develop, Have adaptations
Term
Molecule
Definition
Union of two or more atoms of the same element (also the smallest part of a compound that retains the properties of the compound)
Term
Cell
Definition
Smallest unit that displays the properties of life; composed of cytoplasm, surrounded by a plasma membrane
Term
Tissues
Definition
Group of similar cells combined to perform a common function
Term
Organs
Definition
Combination of two or more different tissues performing a common function
Term
Organ system
Definition
Organs working together
Term
Nutrient
Definition
Chemical substances in foods that are essential to the diet and contribute to good health
Term
Metabolism
Definition
All of the chemical reactions that occur in a cell during growth and repair
Term
Homeostasis
Definition
The maintenance of internal conditions within certain boundaries (i.e. temperature, moisture acidity)
Term
Adaptation
Definition
Organisms modification in a structure, function, or behavior suitable to the environment
Term
Evolution
Definition
The process by which species have changed and diversified since life arose
Term
Natural selection
Definition
Mechanism of evolution caused by environmental selection of organisms most fit to reproduce; results in adaptation to the environment
Term
Taxonomy
Definition
The discipline of identifying * classifying organisms according to certain rules
Term
Domain
Definition
Largest of categories or taxa used by taxonomists to group species; the 3 domains are Archea, Bacteria, & Eukarya
Term
Kingdom
Definition
Category used by taxonomists (above phylum)
Term
Binomial nomenclature
Definition
The system of nomenclature using two terms, the first one indicating the genus and the second the species.
Term
Biosphere
Definition
Zone of air, land & water at the surface of the Earth in which organisms are found
Term
Population
Definition
Group of interbreeding individuals of the same species occupying the same area at the same time
Term
Community
Definition
Populations interacting with one another within the same environment
Term
Ecosystem
Definition
Biological community together with the associated abiotic environment; characterized by flower of energy and a cycling of inorganic nutrients
Term
Producer
Definition
Photosynthetic organisms at the start of a grazing food chain that makes its own food (i.e. green plants on land and algae in water)
Term
Consumer
Definition
Organism that feeds on another organism in a food chain; primary consumers eat plants, and secondary consumers eat animals
Term
Chemical cycling
Definition
Chemical Cycling is the natural process of recycling nutrients/chemicals that plants and animals needs to stay alive and reproduce
Term
Energy cycling
Definition
Energy flows through an ecosystem; as energy is repeatedly passed from one component to another, all the chemical energy derived from solar energy dissipates as heat.
Term
How do you respond to "It's just a theory...a guess"?
Definition
I would tell him that a scientific theory is different than a guess because it is based on existing knowledge. That knowledge was tested and observed over great lengths of time. A guess is something people just “think” but the Germ Theory of Disease has been studied/observed/experimented with in great depths.
Term
Why are scientific binomial names important?
Definition
To avoid confusion-latin is universal (can be used all over without learning languages vs. common name) and a quick way to identify a certain type of animal or species, every species can be unambiguously identified with just two words, when new knowledge comes about =stability (?)
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