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11 Cards in this Set

  • Front
  • Back

______ is the study of body plans and structures

Comparative Morphology

_______ is the degree of adaptation to a specific environment


Individuals with adaptive traits tend to survive longer and produce more offspring, leading to ____ of the species.


Based on the structural similarity of vertebrate limbs, we can conclude that these structures are examples of _______.

Morphological divergence

When a certain form of a trait increases the fitness of the individual, this allele will tend to _______ over time.

Increase in frequency in the population

All vertebrate embryos have _______ at some point during embryonic development, indicating a common evolutionary ancestor.

Four limb buds, a tail, and somites

Bat wings, human forearms, elephant legs, and cat forelimbs are collectively refereed to as ______.

Homologous Structures

Morphological divergence is ________.

Is the change in body form from that of a common ancestor.

Similar structures that have evolved independently in different lineages that do not share common ancestry are called _____.

Analogous structures.

Which genes guide the formation of specific body parts during embryonic development?


Master genes that affect development tend to be highly _____; therefore, similarities in patterns of development reflect shared ancestry that can be evolutionary ancient.