Charles Darwin’s explanation for the differences in the structures of the
forelimbs
Forelimbs of mammals are built on the same pattern but have different
functions. Study the diagram of FIVE mammals and write a mini-essay where you
discuss the modification and functions of their forelimbs. Include in your
discussion Charles Darwin’s explanation for the differences in the structures of
the forelimbs of the five mammals although they are built on the same pattern.
The Bat
• The forelimbs have become wings for flying.
• The first digit is hook-like to hang from trees
• while the last four digits have become elongated to make up the wing
The monkey
• The forelimbs are very long
• to allow it to grasp trees while it is climbing
• and swinging
The mole
• Has a pair of short, spade-like forelimbs
• that are modified for digging
The seal
• The forelimbs have become flippers
• for steering and
• maintaining equilibrium during swimming.
The horse
• The forelimbs are adapted for support
• and running with the third digit being very elongated ending in a hoof
forelimbs
Forelimbs of mammals are built on the same pattern but have different
functions. Study the diagram of FIVE mammals and write a mini-essay where you
discuss the modification and functions of their forelimbs. Include in your
discussion Charles Darwin’s explanation for the differences in the structures of
the forelimbs of the five mammals although they are built on the same pattern.
The Bat
• The forelimbs have become wings for flying.
• The first digit is hook-like to hang from trees
• while the last four digits have become elongated to make up the wing
The monkey
• The forelimbs are very long
• to allow it to grasp trees while it is climbing
• and swinging
The mole
• Has a pair of short, spade-like forelimbs
• that are modified for digging
The seal
• The forelimbs have become flippers
• for steering and
• maintaining equilibrium during swimming.
The horse
• The forelimbs are adapted for support
• and running with the third digit being very elongated ending in a hoof
