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C190 Intro to Biology (WGU) Exam Questions and Complete Solutions Graded A+.
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C190 Intro to Biology (WGU) Exam Questions and Complete Solutions Graded A+.
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C190 Intro to Biology (WGU) ExamQuestions and Complete Solutions
Graded A+
Population - Answer: All the individuals of the same species that occupy the same area and are likely to
breed with one another.
Organ - Answer: A collection of tissues grouped together based on a common general function. Some
common ________ in the human body are the heart, lungs, and kidneys.
Ecosystem - Answer: All the living (biotic) things in a particular area together with the abiotic (nonliving)
materials and conditions in that area; i.e., a biological community and its physical environment.
Cell - Answer: The smallest fundamental unit of structure and function in life. Fluid-filled spaces bound
by a membrane. When first formed, include DNA and other macromolecules and are organized to grow,
reproduce, and respond to changes in the external environment.
Biology - Answer: The scientific study of life. Including anatomy, biochemistry, ecology, evolution,
genetics, immunology, and physiology.
Biotic - Answer: An adjective that describes living organisms or their remains. Common characteristics
are that they use energy and raw materials to grow, sense, and respond to changing environments; they
reproduce; and they consist of one or more cells.
Abiotic - Answer: An adjective that describes nonliving materials in the environment, such as sunlight,
rain, gases in the air, rocks, and chemicals in the soil.
Atom - Answer: The basic unit of matter that cannot be further broken down without losing its unique
properties. Consists of a dense nucleus surrounded by a cloud of electrons.
Biome - Answer: A large naturally occurring community of plants and animals occupying a major habitat.
Examples include tropical forest and arctic tundra.
,Biosphere - Answer: All areas on, within, and around the planet Earth that are capable of supporting life.
Community - Answer: All of the populations interacting with each other within a specified area.
Macromolecule - Answer: A large and complex molecule formed by combining smaller subunits
producing a larger unit consisting of many atoms with new properties.
Molecule - Answer: Two or more atoms held together by a chemical bond.
Organ System - Answer: An integrated collection of organs in the body that work together to perform a
vital function.
Organelle - Answer: A specialized structure within a cell formed when a specific set of molecules bond,
creating a subunit that has a specific function.
Organism - Answer: An individual living entity that survives and reproduces as a unit. Examples include a
single bacterial cell, a plant grown from a single seed, or you—as an individual human being. Any life
form - animal, plant, fungus, bacteria, protist, or single-celled entity.
Tissue - Answer: A groups of similar cells carrying out the same detailed function within an organism. In
the lung, for instance, the lining of airways comprises one type of ________: a layer of similar cells that
forms a sealed surface.
Scientific Inquiry - Answer: The application of scientific observation, experimentation, and the scientific
method to study, interpret, and predict natural phenomena in the world around us.
Chemical Bonds - Answer: Attractions between atoms that hold atoms and molecules together. Three
types - Covalent, Ionic, Hydrogen
Covalent Bonds - Answer: Represent the sharing of the electrons between atoms
, Electronegativity - Answer: The tendency of an atom to hold shared electrons more close to its nucleus.
More likely to draw electrons to self.
Hydrogen Bond - Answer: Interaction between a partially positive hydrogen atom and a partially
negative atom with an unshared (lone) pair of electrons.
Ionic Bonds - Answer: An attractive force generated by the interactions between ions of opposite
charges. Electrons are said to be transferred from one atom to another.
Electron - Answer: Negatively charged subatomic particle that occupies shells surrounding the nucleus
and has a mass that is so small it is considered to be zero.
Neutron - Answer: Subatomic particle with a neutral charge that is contained in the nucleus and has a
mass of approximately 1 atomic mass unit.
Proton - Answer: A positively charged subatomic particle that is contained in the nucleus and has a mass
of approximately 1 atomic mass unit.
Adhesion - Answer: The attraction of water molecules to molecules other than water.
Cohesion - Answer: Describes a property of matter in which particles tend to stick together.
Hydrophilic - Answer: Molecules that are water soluble. Contain polar functional groups that can form
hydrogen bonds or ionic bonds with water.
Hydrophobic - Answer: Molecules do not interact with water and are characterized by a complete lack of
electronegative atoms.
Surface Tension - Answer: The capacity of a liquid's surface to resist being ruptured when placed under
tension or stress.
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