WGU C190 INTRO TO BIOLOGY TEST QUESTIONS AND
ANSWERS (100% CORRECT)
1. Cell - ANSWER 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.
2. Organelle - ANSWER 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.
3. Microorganism - ANSWER Sixth level. Single-celled life form. Consists of just one
cell and include unicellular organisms such as bacteria and protists.
4. Tissue - ANSWER Seventh level. Formed when similar cells work together to
fulfill the same detailed function.
5. Organ - ANSWER 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.
6. Organ System - ANSWER Ninth level. Consists of functionally related organs.
Mammals have many.
7. Organism - ANSWER Tenth Level. Individual living entities that survive and
reproduce as a unit. For example, each tree in a forest.
,8. Population - ANSWER Eleventh level. Consists of all the individuals of a species
living within a specific area.
9. Community - ANSWER Twelfth level. Populations can interact with each other in
positive and negative ways, and together they form this.
10. Ecosystem - ANSWER Thirteenth level. Consists of all the living things in a
particular area together with the abiotic, or nonliving, parts of that environment.
11. Biosphere - ANSWER 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.
12. Emergent Properties - ANSWER Characteristics of a system that are not
present in any of its component parts.
13. Biology - ANSWER The scientific study of life and is the branch of science that
studies living organisms and the way organisms interact with their environments.
14.Abiotic - ANSWER Non-living, may be within or made by a living organism.
15. Biotic - ANSWER Living. Matter is considered ______ if it was ever alive at
some point in time
16. Atom - ANSWER Smallest level. The basic unit of matter. Consists of a dense
nucleus surrounded by electrons.
,17. Molecule - ANSWER Second level. A chemical structure consisting of at least
two atoms held together by a chemical bond.
18. Macromolecule - ANSWER Third level. Biologically important molecules that
are technically polymers. Example: DNA.
19. Homeostasis - ANSWER The ability or tendency of organisms and cells to
maintain stable internal conditions.
20. Nutrient - ANSWER Any matter an organism needs but cannot make for itself.
21.Energy - ANSWER The capacity to do work or to make a change in the location,
temperature, or structure of matter. Does not have mass and it does not take up
space, but it can be measured in terms of what it does.
22.Growth - ANSWER An increase in size.
23. Development - ANSWER Structure and function change in an orderly way as an
organism passes through its life cycle. An individual's pattern of _______ is partly
determined by genetic instructions.
24. Reproduction - ANSWER Occurs when an individual organism passes on its
genetic information to a newly independent organism, or offspring.
, 25. Evolution - ANSWER A scientific theory that explains how and why life changes
over time. Provides the explanation for why all living organisms share profound
similarities, and yet, the life forms on our planet are so incredibly diverse.
26. Natural Selection - ANSWER Individuals are always a bit different from their
parents and from each other, partly because of changes to their genes. These
differences may be helpful or harmful to the individuals that inherit them. In
nature, individuals often have very low odds of surviving to reproduce. Individuals
with slightly harmful or even average characteristics might be less likely to make it,
and those with traits that fit in very well with the local habitat will have the
greatest chance to survive and reproduce. This sorting process goes on generation
after generation.
27. Atomic Mass - ANSWER The sum of the number of protons and the number of
neutrons. The mass of an atom.
28. Atomic Number - ANSWER The number of protons in an atom, displayed for
each atom in the periodic table.
29. Chemical Bonds - ANSWER Attractions between atoms that hold atoms and
molecules together.
30. Covalent Bonds - ANSWER Strongest chemical bond. Occurs between atoms of
in the same molecule. Electron pairs are shared, creating a strong bond between
atoms.
31. electron - ANSWER Subatomic particle, located in shells on the outside of the
nucleus, has a negative charge and almost no mass.
ANSWERS (100% CORRECT)
1. Cell - ANSWER 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.
2. Organelle - ANSWER 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.
3. Microorganism - ANSWER Sixth level. Single-celled life form. Consists of just one
cell and include unicellular organisms such as bacteria and protists.
4. Tissue - ANSWER Seventh level. Formed when similar cells work together to
fulfill the same detailed function.
5. Organ - ANSWER 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.
6. Organ System - ANSWER Ninth level. Consists of functionally related organs.
Mammals have many.
7. Organism - ANSWER Tenth Level. Individual living entities that survive and
reproduce as a unit. For example, each tree in a forest.
,8. Population - ANSWER Eleventh level. Consists of all the individuals of a species
living within a specific area.
9. Community - ANSWER Twelfth level. Populations can interact with each other in
positive and negative ways, and together they form this.
10. Ecosystem - ANSWER Thirteenth level. Consists of all the living things in a
particular area together with the abiotic, or nonliving, parts of that environment.
11. Biosphere - ANSWER 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.
12. Emergent Properties - ANSWER Characteristics of a system that are not
present in any of its component parts.
13. Biology - ANSWER The scientific study of life and is the branch of science that
studies living organisms and the way organisms interact with their environments.
14.Abiotic - ANSWER Non-living, may be within or made by a living organism.
15. Biotic - ANSWER Living. Matter is considered ______ if it was ever alive at
some point in time
16. Atom - ANSWER Smallest level. The basic unit of matter. Consists of a dense
nucleus surrounded by electrons.
,17. Molecule - ANSWER Second level. A chemical structure consisting of at least
two atoms held together by a chemical bond.
18. Macromolecule - ANSWER Third level. Biologically important molecules that
are technically polymers. Example: DNA.
19. Homeostasis - ANSWER The ability or tendency of organisms and cells to
maintain stable internal conditions.
20. Nutrient - ANSWER Any matter an organism needs but cannot make for itself.
21.Energy - ANSWER The capacity to do work or to make a change in the location,
temperature, or structure of matter. Does not have mass and it does not take up
space, but it can be measured in terms of what it does.
22.Growth - ANSWER An increase in size.
23. Development - ANSWER Structure and function change in an orderly way as an
organism passes through its life cycle. An individual's pattern of _______ is partly
determined by genetic instructions.
24. Reproduction - ANSWER Occurs when an individual organism passes on its
genetic information to a newly independent organism, or offspring.
, 25. Evolution - ANSWER A scientific theory that explains how and why life changes
over time. Provides the explanation for why all living organisms share profound
similarities, and yet, the life forms on our planet are so incredibly diverse.
26. Natural Selection - ANSWER Individuals are always a bit different from their
parents and from each other, partly because of changes to their genes. These
differences may be helpful or harmful to the individuals that inherit them. In
nature, individuals often have very low odds of surviving to reproduce. Individuals
with slightly harmful or even average characteristics might be less likely to make it,
and those with traits that fit in very well with the local habitat will have the
greatest chance to survive and reproduce. This sorting process goes on generation
after generation.
27. Atomic Mass - ANSWER The sum of the number of protons and the number of
neutrons. The mass of an atom.
28. Atomic Number - ANSWER The number of protons in an atom, displayed for
each atom in the periodic table.
29. Chemical Bonds - ANSWER Attractions between atoms that hold atoms and
molecules together.
30. Covalent Bonds - ANSWER Strongest chemical bond. Occurs between atoms of
in the same molecule. Electron pairs are shared, creating a strong bond between
atoms.
31. electron - ANSWER Subatomic particle, located in shells on the outside of the
nucleus, has a negative charge and almost no mass.
