1
.
-
A
species
that
has
decreased
until
it
is
almost
endangered
is
considered
____________________
.
2
.
-
Species
that
no
longer
exists
is
considered
____________________
.
3
.
-
The
term
used
to
describe
the
wide
variety
of
life
on
Earth
is
____________________
.
4
.
-
Species
that
may
become
extinct
if
its
population
decreased
further
is
considered
____________________
.
5
.
-
A
condition
that
controls
the
size
or
growth
of
a
population
is
called
a
____________________
factor
.
6
.
-
When
a
community
has
stabilized
and
succession
has
slowed
down
or
stopped
,
it
is
a
____________________
community
.
7
.
-
The
gradual
replacement
of
one
community
by
another
is
called
____________________
.
8
.
-
The
first
species
to
establish
themselves
in
a
lifeless
area
form
a
____________________
community
.
9
.
-
Organisms
that
remain
in
a
region
must
____________________
to
changes
in
the
environment
.
10
.
-
Some
limiting
factors
are
living
,
or
____________________
and
some
are
nonliving
,
or
____________________
.
