History of Darwin
Where did Darwin study, that helped him develop his idea of Natural Selection?
Galapagos Islands
Charles Darwin demonstrated that variation was common in many _________ but he did not know the cause.
Species
The process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do; a theory to explain the mechanism of evolution.
Natural Selection
What ship took Charles Darwin to the Galapagos Islands?
H.M.S. Begal
Darwin observed that organisms have the potential for very __________________.
High Fertility
A genetically determined characteristic.
Trait
The concept of evolution, that organisms may change over time, was not new in Darwin’s time. However, it was not a widely accepted concept because no one understood how it could work. A ___________ was missing.
Mechanism
Natural selection can only work on ________ traits.
Heritable
Includes all of the changes in the characteristics and diversity of life that occur throughout time.
Evolution
What helped Darwin develop his theory of Natural Selection?
Finches (several species)
Natural selection is not the only way that allele
frequencies can change from one generation to the
next. _____________ – a random loss of alleles.
Genetic Drift
Includes all of the changes in the characteristics and diversity of life that occur throughout time.
The human practice of breeding animals or plants that have certain desired traits.
Selective Breeding
________ fossils reveal how fish evolved into four-legged land animals.
Tiktaalik
Evolution that occurs on a small and large scale.
Microevolution and Macroevolution
Individuals are not identical; They differ in many different traits.
Variation