Western Governors University D 570
WGU C190 Intro to Biology Exam Questions and Answers
,Abiotic
Non-living, may be within or made by a living organism.
Biotic
Living. Matter is considered___if it was ever alive at some point in time
Atom
Smallest level. The basic unit of matter. Consists of a dense nucleus
surrounded by electrons.
Molecule
Second level. A chemical structure consisting of at least two atoms held
together by a chemical bond.
Macromolecule
Third level. Biologically important molecules that are technically polymers.
Example: DNA.
,Cell
Fourth level. The fundamental unit of life. Essentially a tiny droplet of water
and other molecules enclosed by a fluid "skin" or membrane. The smallest and
simplest entity that possesses all the characteristics of life.
Organelle
Fifth level. Compartments inside the cell that contain specific groups of
macromolecules and carry out specific cellular functions. One of these
organelles is the nucleus; it
encloses the DNA within the cell.
Microorganism
Sixth level. Single-celled life form. Consists of just one cell and include
unicellular organisms such as bacteria and protists.
Tissue
Seventh level. Formed when similar cells work together to fulfill the same
detailed function.
Organ
Eighth level. Collections of tissues that work together to carry out a common
general function. Present not only in higher level animals but also in plants.
Organ System
Ninth level. Consists of functionally related organs. Mammals have many.
Organism
Tenth Level. Individual living entities that survive and reproduce as a unit. For
example, each tree in a forest.
, Population
Eleventh level. Consists of all the individuals of a species living within a specific
area.
Community
Twelfth level. Populations can interact with each other in positive and negative
ways, and together they form this.
Ecosystem
Thirteenth level. Consists of all the living things in a particular area together
with the abiotic, or nonliving, parts of that environment.
Biosphere
Fourteenth level. The highest level of organization in living systems. The
collection of all ecosystems on Earth. Includes all habitable zones on the
planet, including land, soil, and rocks to a great depth in the Earth's crust;
water and ice; and the atmosphere to a great height.
Emergent Properties
Characteristics of a system that are not present in any of its component parts.
WGU C190 Intro to Biology Exam Questions and Answers
,Abiotic
Non-living, may be within or made by a living organism.
Biotic
Living. Matter is considered___if it was ever alive at some point in time
Atom
Smallest level. The basic unit of matter. Consists of a dense nucleus
surrounded by electrons.
Molecule
Second level. A chemical structure consisting of at least two atoms held
together by a chemical bond.
Macromolecule
Third level. Biologically important molecules that are technically polymers.
Example: DNA.
,Cell
Fourth level. The fundamental unit of life. Essentially a tiny droplet of water
and other molecules enclosed by a fluid "skin" or membrane. The smallest and
simplest entity that possesses all the characteristics of life.
Organelle
Fifth level. Compartments inside the cell that contain specific groups of
macromolecules and carry out specific cellular functions. One of these
organelles is the nucleus; it
encloses the DNA within the cell.
Microorganism
Sixth level. Single-celled life form. Consists of just one cell and include
unicellular organisms such as bacteria and protists.
Tissue
Seventh level. Formed when similar cells work together to fulfill the same
detailed function.
Organ
Eighth level. Collections of tissues that work together to carry out a common
general function. Present not only in higher level animals but also in plants.
Organ System
Ninth level. Consists of functionally related organs. Mammals have many.
Organism
Tenth Level. Individual living entities that survive and reproduce as a unit. For
example, each tree in a forest.
, Population
Eleventh level. Consists of all the individuals of a species living within a specific
area.
Community
Twelfth level. Populations can interact with each other in positive and negative
ways, and together they form this.
Ecosystem
Thirteenth level. Consists of all the living things in a particular area together
with the abiotic, or nonliving, parts of that environment.
Biosphere
Fourteenth level. The highest level of organization in living systems. The
collection of all ecosystems on Earth. Includes all habitable zones on the
planet, including land, soil, and rocks to a great depth in the Earth's crust;
water and ice; and the atmosphere to a great height.
Emergent Properties
Characteristics of a system that are not present in any of its component parts.
