Please enable JavaScript.
Coggle requires JavaScript to display documents.
Darwinism & Gradualism - Coggle Diagram
Darwinism & Gradualism
Homologous structures
are anatomical resemblances that represent variations on a structural theme present in a common ancestor
Ex. Wing to an Arm, Arm to a Flipper
Evolution
refers to the process by which species accumulate differences from their ancestors as they adapt to different environments over time (Descent with modification)
Paleontology
the study of fossils, was developed in large part by Georges Cuvier (1769-1832)
Galapagos Islands
Darwin collected many similar, but different species of birds, some unique to individual islands, others found on multiple islands.
Adaptations
are inherited characteristics that enhance an organism’s survival and reproduction in specific environments
-
-
Natural Selection
is a process in which individuals with certain inherited traits tend to survive and reproduce at higher rates because of those traits.
-
-
-
Convergent evolution
is the evolution of similar, or Analogous features in distantly related groups
Analogous traits
arise not through common ancestry, but through independent adaptation to similar environments.
Biogeography
the scientific study of the geographic distribution of species, provides support for evolution.
Species distributions are influenced by continental drift, the gradual movement of Earth’s landmasses
Ex. For example, 250 million years ago, all land masses formed a single large continent called Pangea