A
flower
,
sometimes
known
as
a
____________________
or
____________________
,
is
the
reproductive
structure
found
in
flowering
plants
(
plants
of
the
division
Magnoliophyta
,
also
called
angiosperms
)
.
The
biological
function
of
a
flower
is
to
effect
____________________
,
usually
by
providing
a
____________________
for
the
union
of
sperm
with
____________________
.
Flowers
may
facilitate
outcrossing
(
fusion
of
sperm
and
eggs
from
different
individuals
in
a
population
)
or
allow
selfing
(
fusion
of
sperm
and
egg
from
the
same
flower
)
.
Some
flowers
produce
diaspores
without
____________________
(
parthenocarpy
)
.
Flowers
contain
sporangia
and
are
the
site
where
gametophytes
develop
.
Flowers
give
rise
to
____________________
and
____________________
.
Many
flowers
have
evolved
to
be
____________________
to
animals
,
so
as
to
cause
them
to
be
vectors
for
the
transfer
of
____________________
.
