Evolution
This involves populations of a species changing over time.
What is Evolution?
The survival and reproduction of the organisms that are genetically best fit for their environment
What is the definition of Natural Selection?
When a species has variation, what "selects" for or against a specific trait for survival?
The environment
The hip bones of a dolphin and the tailbone of a human are known as what?
What are Vestigial Structures?
A theory (explanation) supported by evidence for how populations change over time
What is evolution?
The variety of dog and cat breeds that we have today are a product of _________ _____________.
What is Artificial selection
An example of a structure that is homologous to a cat’s paw.
What is a Dog’s paw, human arm, bat wing, whale flipper
The theory that proposes eukaryotic cells evolved from cells engulfing prokaryotic organisms that then became mitochondria and chloroplasts.
Endosymbiosis
The name of the islands where Darwin studied and gathered his evidence on Natural Selection
What are The Galapagos Islands?
When a random event causes a change in allele frequencies, this is known as_______________.
Genetic Drift
A group of organisms that look alike, can reproduce, and produce viable offspring?
What is a species?
Evolution can only if within a species there is ___________.
What is Genetic Variety?
Lamarck said that organisms acquire traits during their lifetime and then pass them on to their offspring
How is the theory of natural selection different from Lamarck's theory?
The random appearance of a new trait in an organism, that was not passed down by a parent.
Mutation
In embryology, what explains why some embryos are very similar to each other?
What is a common ancestor?
Why are a polar bear and a grizzly bear not the same species, even though they have similar DNA can produce viable offspring?
Ecological isolation
What determines "fitness" in natural selection?
The ability to survive and reproduce
Sometimes two species will live in the same environment and could reproduce, but will not. Identify a type of isolation that would cause this.
Behavioral, temporal
What type of evidence is the most concrete way to determine if two organisms are related?
Biochemistry (DNA)
Why are bacteria and viruses able to evolve so fast?
Reproduction occurs very quickly