Natural Selection
What is natural selection?
Natural selection is the process of which organisms that are best suited for their environment are able to survive and reproduce.
What leads to evolution?
Natural Selection.
What is variation?
Genetic differences among individuals in a population.
What are Cladograms?
Shows the evolutionary relationship between species.
What are Transitional Fossils?
Fossils that have both the traits of an older group of organisms and modern-day group of organisms.
What must natural selection need in order for it to occur?
Variation.
What is evolution?
Species change over time.
What are the 2 main sources of variation?
Mutations and Sexual Reproduction.
What does it mean if the branches are far apart?
It means that the species are not closely related.
What allows us to see how organisms evolved over time?
Transitional Fossils.
What does natural selection lead to?
Evolution.
How is evolution helpful?
Evolution helps tracks the organisms that are the best fit for their environment and able to survive and reproduce.
What does the mutations do in variation?
Changes in the DNA sequence.
What does it mean when the branches are close together?
It means that the species are closely related.
What Fossils are more complex?
The younger Fossils are more complex.
What is competition?
There's a struggle for survival within a population for resources needed to survive.
What does evolution allow species to do?
It allows species to develop traits over time.
What creates variation?
Recombination of genes occurs that allows for new arrangement of genes during meiosis.
What is the common ancestor?
A species from which 2 species evolved.
What Fossils are less complex?
The older Fossils are less complex.
What are Acquired Traits?
Traits that can't be passed down because they're not coded for in DNA.
Why is evolution needed?
It helps species adapt and survive in changing conditions.
What does variation allow?
Organisms to be best suited for the environment.
What is a descendant?
Organism that developed from another thing that existed earlier.
What are Homologous structures?
Body parts with similar structures found in different species.