A
____________________
is
"
all
of
the
people
born
and
____________________
at
about
the
same
time
,
regarded
collectively
.
"
It
can
also
be
____________________
as
,
"
the
average
period
,
generally
considered
to
be
about
thirty
____________________
,
during
which
children
are
____________________
and
grow
up
,
become
adults
,
and
begin
to
have
____________________
of
their
own
.
"
In
kinship
terminology
,
it
is
a
structural
term
designating
the
parent
-
child
____________________
.
It
is
also
known
as
biogenesis
,
reproduction
,
or
procreation
in
the
____________________
sciences
.
"
Generation
"
is
also
often
used
synonymously
with
cohort
in
social
science
;
under
this
formulation
it
____________________
"
people
within
a
delineated
population
who
experience
the
same
significant
events
within
a
given
period
of
time
"
.
Generations
in
this
sense
of
birth
cohort
,
also
known
as
"
social
generations
"
,
are
____________________
used
in
popular
culture
,
and
have
been
the
basis
for
sociological
____________________
.
Serious
analysis
of
generations
began
in
the
nineteenth
____________________
,
emerging
from
an
increasing
awareness
of
the
possibility
of
permanent
social
change
and
the
idea
of
youthful
rebellion
____________________
the
established
social
order
.
Some
analysts
believe
that
a
generation
is
one
of
the
fundamental
social
categories
in
a
society
,
while
others
view
its
importance
as
being
overshadowed
by
other
____________________
including
class
,
gender
,
____________________
,
education
,
among
others
.
