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Standard Area - TECH: Learning Standards for Technology
(see MST standards under Previous Standard Versions)-
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Introduction - MST4.C.LE.LE.1.Introduction:
Living things are similar in that they rely on many of the same processes to stay alive, yet are different in the ways that these processes are carried out.
Nonliving things lack certain features of living organisms, such as the ability to maintain a cellular organization, carry out metabolic processes while maintaining internal stability (homeostasis), and pass on hereditary information through reproduction.
In most biological respects, humans are like other living organisms. For instance, they are made up of cells like those of other animals, have much the same chemical composition, have organ systems and physical characteristics like many others, reproduce in a similar way, carry the same kind of genetic information system, and are part of a food web.
The components of living systems, from a single cell to an ecosystem, interact to maintain balance. Different organisms have different regulatory mechanisms that function to maintain the level of organization necessary for life. Diversity is evident and important at all levels of organization; from a single cell to a multicellular organism to an ecosystem.
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Major Understandings - MST4.C.LE.LE.1.1a:
Populations can be categorized by the function they serve. Food webs identify the relationships among producers, consumers, and decomposers carrying out either autotropic or heterotropic nutrition. -
Major Understandings - MST4.C.LE.LE.1.1b:
An ecosystem is shaped by the nonliving environment as well as its interacting species. The world contains a wide diversity of physical conditions, which creates a variety of environments. -
Major Understandings - MST4.C.LE.LE.1.1c:
In all environments, organisms compete for vital resources. The linked and changing interactions of populations and the environment compose the total ecosystem. -
Major Understandings - MST4.C.LE.LE.1.1d:
The interdependence of organisms in an established ecosystem often results in approximate stability over hundreds and thousands of years. For example, as one population increases, it is held in check by one or more environmental factors or another species. -
Major Understandings - MST4.C.LE.LE.1.1e:
Ecosystems, like many other complex systems, tend to show cyclic changes around a state of approximate equilibrium. -
Major Understandings - MST4.C.LE.LE.1.1f:
Every population is linked, directly or indirectly, with many others in an ecosystem. Disruptions in the numbers and types of species and environmental changes can upset ecosystem stability.
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