Unit 7 Evolution and Classification

Front

Descent with Modification

Back

A change in gene frequency over time leading to more organisms with beneficial adaptations within a population.

Front

Analogous Structures

Back

Structures that serve similar functions in different organisms but do not share a common ancestor.

Front

Domain Archaebacteria

Back

A domain of life that includes bacteria that live in extreme environments.

Front

Bony Skeleton

Back

A skeletal structure made of bone; organisms without a bony skeleton are classified differently.

Front

Mutation

Back

A change in DNA sequence that creates new genotypes/phenotypes, increasing variation within a population.

Front

Natural Selection

Back

The process where organisms better adapted to their environment tend to survive and produce more offspring.

Front

Gene Flow

Back

The transfer of genetic material between populations, which can increase genetic diversity.

Front

Sexual Selection

Back

A mode of natural selection where certain traits increase an individual's chances of attracting mates.

Front

Homologous Structures

Back

Structures that are similar in different species due to shared ancestry, even if they have different functions.

Front

Vestigial Structures

Back

Body parts that have lost their original function through evolution.