Chapter 15
What is evolution?
Changes an organisms over generations.
What is natural selection?
Best adapted organism survive and reproduce passing down traits to next generations
What is a population?
A group of organisms that are in the same species
What is a gene pool?
All the genes and different versions in a population
What is a prokaryote?
A cell with no nucleus
What does survival of the fittest stand for?
The organism that adapt the best
Artificial selection is when?
Human selective traits that are useful to them
A single gene tree usually has
Branches that show the evolutionary relationships
Which isolation can lead to speciation
Reproductive isolation
Which type of bacteria can survive with or without oxygen?
Facultative anaerobes
What are vestigial organs
a body part that no longer has an important function.
When does evolution occur most rapidly?
resistance of bacteria and insects.
What is stabilizing selection?
The average tree is favored, and the extreme are selected against
When does speciation occur
When one species splits into two new species and they stop sharing genes
What is it called when bacteria divided into two identical daughter cells
Binary vision
explain why not all offspring survive?
They don’t survive because there are limited things like food and water.
What does the tree of life represent?
That all organisms are related
Which selection favors one extreme
Directional selection
Why do populations evolve?
They adapted their environment and survive
Why are cyanobacteria important in aquatic environments
They produce oxygen through photosynthesis
What was the name of the ship Darwin traveled on?
Beagle
Which scientist role principles of geology?
Charles Lylell
what is reproductive isolation?
Two groups are the same species can no longer mate
What is the difference between a genotype and a phenotype
Genotype is a genetic make up of an organism and a phenotype is a physical appearance or trait you can see
What is the toxin produced by living bacteria that travel through the bloodstream?
Exotoxin