WGU D849 Exam Questions and Correct Answers 100% Verified Graded A+
Biology - The Study of Life
What are the 5 qualities that are used to determine whether something is (or was) alive? -
To be considered alive, something must:
be made of materials organized in a hierarchical pattern
use energy and raw materials to survive
sense and respond to changes in their environment and maintain homeostasis
grow, develop and reproduce
be part of a population that evoles
Biotic - Living organisms or their remains
Abiotic - Nonliving things in an enviornment
Atom - The basic unit of matter
Proton - a positively charged subatomic particle contained in the nucleus.
Mass is ~1 atomic mass unit (AMU)
,Electron - A negatively charged subatomic particle that orbits the nucleus in orbital shells.
Considered to have no mass
Neutron - A subatomic particle with a neutral charge that is contained in the nucleus.
~1 amu
Molecule - A chemical structure consisting of at least two atoms held together by a
chemical bond.
Macromolecules - large and complex molecules esstial for life.
EX. Deoxyribonucleic acid (DNA)
Cell - The smallest fundamental unit of life
Organelles - Specialized structures, formed by specific groups of macromolecules, within
a cell that perform specific functions.
Tissues - A group of similar cells carrying out the same function.
, Organs - Collections of tissues that work together to carry out a common function.
Organ System - An integrated collection of organs that work together to perform a vital
function.
Organisms - Indivdual living entities that survive and reproduce as a unit
Population - Consists of all the individuals of a species living within a specific area.
Community - All the populations that live and interact within a specific environment.
Excludes abiotic factors.
Ecosystem - All the biotic and abiotic factors in a particular area make up an environment.
Biomes - Areas of Earth with similar characteristics of abiotic and biotic factors.
Biosphere - All the habitable zones on, within and around Earth
In biological systems, what are the major elements? - The following elements represent
95% of a cell's mass:
Carbon (C)
Biology - The Study of Life
What are the 5 qualities that are used to determine whether something is (or was) alive? -
To be considered alive, something must:
be made of materials organized in a hierarchical pattern
use energy and raw materials to survive
sense and respond to changes in their environment and maintain homeostasis
grow, develop and reproduce
be part of a population that evoles
Biotic - Living organisms or their remains
Abiotic - Nonliving things in an enviornment
Atom - The basic unit of matter
Proton - a positively charged subatomic particle contained in the nucleus.
Mass is ~1 atomic mass unit (AMU)
,Electron - A negatively charged subatomic particle that orbits the nucleus in orbital shells.
Considered to have no mass
Neutron - A subatomic particle with a neutral charge that is contained in the nucleus.
~1 amu
Molecule - A chemical structure consisting of at least two atoms held together by a
chemical bond.
Macromolecules - large and complex molecules esstial for life.
EX. Deoxyribonucleic acid (DNA)
Cell - The smallest fundamental unit of life
Organelles - Specialized structures, formed by specific groups of macromolecules, within
a cell that perform specific functions.
Tissues - A group of similar cells carrying out the same function.
, Organs - Collections of tissues that work together to carry out a common function.
Organ System - An integrated collection of organs that work together to perform a vital
function.
Organisms - Indivdual living entities that survive and reproduce as a unit
Population - Consists of all the individuals of a species living within a specific area.
Community - All the populations that live and interact within a specific environment.
Excludes abiotic factors.
Ecosystem - All the biotic and abiotic factors in a particular area make up an environment.
Biomes - Areas of Earth with similar characteristics of abiotic and biotic factors.
Biosphere - All the habitable zones on, within and around Earth
In biological systems, what are the major elements? - The following elements represent
95% of a cell's mass:
Carbon (C)
