We define fitness, adaptation, species and evolution in terms of this.
What is genetics or DNA
100
A group of organisms of the same species that can interbreed and produce fertile offspring is a.
What is a population.
100
New species form from this.
What is old species
100
Mass extinction has occured and we believe that _____ percent of all known species are gone.
What is 99.
100
Mutations that occur don't always affect this.
What is phenotype.
200
Genes are the source of _____ ______ which is the bases of how natural selection works.
What is random variation.
200
All members of a population share a set of genes which is called_______.
What is a gene pool.
200
New species usually only form when populations are this.
What is isolated from each other.
200
Mass extinction has lead to whole _______ being wiped out.
What is ecosystems.
200
Adaptive radiation is also known as this.
What is divergent evolution.
300
The two ways of getting variation within a species are ____
What are mutations and gene shuffling.
300
Evolution can be defined in terms of _______ which is the number of times an _______ occurs in a gene pool.
What is relative frequency and an allel.
300
There are 3 types of reproductive isolation, the one that is due to diferences in courtship is called this.
What is behavioral isolation.
300
When many different species develop from common ancestors we refer to this as.
What is adaptive radiation.
300
Where and organism lives and it's job that it has there is referred to as its.
What is niche.
400
There are two things that can cause mutations these are?
What are mistakes in replication and outside sources such as chemicals and radiation.
400
Evolution acts on ________ as natural selection works on ___________ not phenotypes.
What is populations and genes.
400
The reproductive isolation due to barriers is called this.
What is geographic isolation.
400
Unrelated organisms that develop simillar in appearance and behavior due to similar environmental demands are said to have this type of evolution.
What is convergent.
400
Structures that form from different organs or tissue but end up similar in appearance and function are called this.
What is analogous.
500
Gene shuffling can result in variation, there are two methods that can achieve this.
What are sexual reproduction and crossing over.
500
During equilibrium a population doesn't change much. For equilibrium to be reached these 5 conditions must be met.
What are 1. random mating
2. large population
3. no movement in or out of the population
4. no mutations
5. no natural selection
500
The reproductive isolation that is due to different periods of fertility is called this.
What is temporal isolation.
500
Different organisms that evolve closely connected as they interact together and respond to changes in each other are said to have this type of evolution.
What is coevolution.
500
Genes that are thought to help determine body plans are referred to as this.