Penn Foster - Intro To Biology L1:
Chapter 1, Biology:The Science of Life
Exam Q&A 100% Solved
Biology - The scientific study of life
Cell - The smallest, most basic unit of life
Multicellular - Organisms composed of many types of cells
Tissues - Formed by similar cells combining
Organs - Fo...
Multicellular - ✔✔Organisms composed of many types of cells
Tissues - ✔✔Formed by similar cells combining
Organs - ✔✔Formed when various tissues combine and work together in
organ systems
Organ Systems - ✔✔Various organs combine to work together
Population - ✔✔All the members of a species (organisms with a similar
structure that are capable of interbreeding) within a particular area.
Community - ✔✔When populations interact
Ecosystem - ✔✔Communities interact with the physical environment
Biosphere - ✔✔Collective ecosystems on the planet
, Levels of Biological Organization (most inclusive to least inclusive) -
✔✔Biosphere, Ecosystem, Community, Population, Organism, Organ
System, Organ, Tissue, Cell, Molecule, Atom
Energy - ✔✔The capacity o do work
Metabolism - ✔✔All of the chemical reactions that occur in a cell
Photosynthesis - ✔✔A process that transforms solar energ into the
chemical energy of nutrient molecules
Homeostasis - ✔✔The maintenance of internal conditions within certain
boundaries
Genes - ✔✔Genetic instructions inherited from parents
Mutations - ✔✔Inheritable changes in genetic information
Adaptation - ✔✔Modifications that make organisms suited to their way of
life
Evolution - ✔✔The process in which populations accumulate adaptations
over time to become more suited to their environment
Natural Selection - ✔✔Based on how a population changes in response to
its environment, A natural process resulting in the evolution of organisms
best adapted to the environment.
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