weakest
die.
☆、正文 9 HYBRIDISM.(1)
Distinction
between
the
sterility
of first
crosses
and of
hybrids.
Sterility
various in
degree,
not
universal,
affected
by close
inter-
breeding,
removed by
domestication.
Laws
governing
the
sterility
of
hybrids.
Sterility
not a
special
endowment,
but
incidental
on other
differences.
Causes of
the
sterility
of first
crosses
and of hy-
brids.
Parallelism
between
the
effects of
changed
conditions
of life



![魔道祖师[重生]精修版](http://j.erqutxt.cc/predefine_QI77_2111.jpg?sm)



![青史成灰[多尔衮重生]](http://j.erqutxt.cc/predefine_hV8_36016.jpg?sm)








![爷,听说您弯了?[重生]](http://j.erqutxt.cc/uploaded/V/IVX.jpg?sm)
