|cations of |
Effects of |Effects of |Effects of use and |one and the |Effects of
use. (The |use: |disuse, discussed at |same type." |use and
only examples|characters |length. | |disuse (in
given are the|produced by | | |some
callosities |their own |Vestigial structures the| |cases).
on legs of |exertions in |remains of organs | |
camel, of |consequence |actively used by | |
baboon, and |of their |ancestors of present | |
the |desires, |forms. | |
thickening by|aversions, | | |
use of soles |lust, hunger,|New wants or necessities| |
on man's |and security.|induced by changes of | |
feet.) | |climate, habitat, etc., | |
|Sexual |result in production of | |
|selection, |new propensities, new | |
|law of |habits, and functions. | |
|battle. | | |
| |Change of habits | |
|Protective |originate organs; change| |
|mimicry. |of functions create new | |
| |organs; formation of new| |
|Origin of |habits precede the | |
|organs before|origin of new or | |
|development |modification of organs | |
|of their |already formed. | |
|functions. | | |
| |Geographical isolation | |Isolation
|Inheritance |suggested as a factor in| |"an
|of acquired |case of man. | |important
|characters | | |element."
|(vaguely |Swamping effects of | |
|stated). |crossing. | |
| | | |
|Instincts |Lamarck's definition of | |
|result of