Evolution, Lamarck Flashcards
the slow (thousands to millions of years), gradual change in a species over time.
Evolution
process through which species change over time.
Evolution
Explains the diversity of life on Earth.
Evolution
When there are short reproductive rates…
species evolves quickly
2 Major Principles of Lamarck’s Theory
- Use & Disuse
- Inheritance of Acquired Characteristics
the more an animal uses a body part, the more developed it becomes (vice-versa).
Use & Disuse
more used = more developed
less used = less developed
Use & Disuse
characteristics an organism develops/acquires in its lifetime can be passed on to its offspring.
Inheritance of Acquired Characteristics
Evidence for Evolution (FE)
- Fossil Evidence
- Evolutionary Relationships
any trace or remains of an organism that has been preserved by natural processes.
Fossil Evidence
Categories of Evolutionary Relationships (2) (SM)
- Structural
- Molecular/Biochemical
similar internal structure, different form and structure.
Homologous Structures
similar external form and function, different internal structure.
Analogous Structures
comparing embryos at various stages of development may show similarities not present after birth.
Embryological Evidence
technique used to separate DNA fragments according to their size.
Gel Electrophoresis
