Evolution 1
Speciation requires isolation that may be caused by these factors.
What is behavioural, temporal, ecological or habitat isolation
The ability of an individual to survive and reproduce is known as this.
What is fitness?
Individuals in a population select mates, often on the basis of their phenotypes.
What is non random mating?
The area where DNA is located in all cells.
What is the nucleus?
The concept that members of each species compete regularly for food, space, and other necessities is known as this.
What is competition?
Physical or behavioural barriers lead to a new species forming over time.
What is speciation?
Any inherited trait that increases an organism's chance of survival is known as this.
What is an adaptation?
Changes in allele frequencies
What is genetic drift?
The shape of DNA. Can be called a spiral staircase.
What is Double Helix?
Preserved remains of ancient organisms used by scientists as evidence to support the theory of evolution are known as this.
What are fossils?
Ecological role or way of life of an organism.
What is a niche?
The concept that organisms who are the best suited to their environment will be the most successful
What is survival of the fittest?
Allele frequencies in either or both populations change through "flow" or movement
What is gene flow (migration)?
Segments of DNA that carry instructions to create different proteins, which allow our cells to carry out a variety of functions needed to survive.
What is a gene?
Changing percentages, or frequencies, of alleles within populations are the small events that lead to evolution within a population.
What is microevolution?
Isolating mechanisms where organisms have successfully fertilized an egg, but the zygotes are not viable or fertile.
What are post-zygotic isolating mechanisms?
The process in which nature determines which individuals/adaptations survive is known as this.
What is natural selection?
Darwin's major example of adaptive radiation happened in this location.
What is The Galapagos Islands?
Adenine binds with thymine and guanine binds with cytosine.
What is a complementary base pairing?
This term refers to the availability of different traits and alleles within a population.
What is variation?
Isolation mechanisms where organisms do not mate and prevent fertilization of eggs.
What is pre- zygotic isolating mechanisms?
The concept of humans selecting desired traits in species for exploitation is known as this.
What is artificial selection?
This type of natural selection favours an intermediate phenotype and acts against extreme variants of the phenotype.
What is Stabilizing selection?
When an error occurs in the replication process it negatively impacts the organism's ability to survive and reproduce.
What is a harmful mutation?
Different variations of the same gene in a population. Offspring can get two different from their parents.
What is an allele?
Two populations in an environment become geographically separated allowing them to evolve independently.
What is allopatric speciation?
Rapid change one earth that causes species die. An example would be dinosaurs. Evidence that not all evolution occurs gradually.
What is mass extinction?
Gene pool change that results from a rapid decrease in population size.
What is bottleneck effect?
When an error occurs in the replication process it does not impact the organism's ability to survive and reproduce.
What is a neutral mutation?