Evolution 1
What did Lamarck coin?
Theory of inherited acquired characteristics
What is the name of a diagram of evolution of traits over time?
Cladogram
According to Charles Darwin the driving force of evolution.
What is natural selection?
Necessary for natural selection to occur
What is genetic variation?
Any inherited trait that increases an organism's chance of survival is known as this.
What is an adaptation?
When two animals mate that are different species and produce a sterile offspring, what type of barrier is this?
Post zygotic barrier
What speed of evolution results in small changes over time?
Gradualism
This term refers to the availability of different traits and alleles within a population.
What is variation?
The concept that organisms who are the best suited to their environment will be the most successful
What is survival of the fittest?
When a natural disaster occurs and only some organisms survive, leading to a change in the gene pool this is called:
Bottleneck effect
When an organism has an environmental condition which makes it challenging to survive, such as predation, what is this condition called?
selective pressure
Structures that have different mature forms but develop from the same embryologic tissues are known as this.
What are homologous structures?
If there are brown rabbits and tan rabbits living in a desert, and mostly tan rabbits are surviving due to predation, what type of natural selection is this?
Directional
The process where the best adapted individuals of a species are the ones most likely to survive and reproduce, thereby passing their beneficial traits on to their offspring.
What is natural selection?
When new species of flowers develop in the same garden due to genetic changes this process is called:
Sympatric speciation
What type of speciation is the result of geographical barriers?
Allopatric
What was Darwin's theory?
Survival of the fittest
Some members of a population are more likely to survive changing environmental conditions and reproduce because they have different and superior traits. The presence of different traits within members of a species
What is variation?
Organisms within populations differ in their what?
What are traits?
A famous scientist who suggested (incorrectly) that the neck of the giraffe became longer because it was stretching to reach high leaves.
Lamarck
When mates choose their mate based on say, a mating dance, what is this called?
Sexual selection
What is gene flow?
the movement of genes into or out of a population
What is adaptation?
Acquired traits are learned during an organism's lifetime and are not passed (genetically) on, while traits developed through natural selection may be passed (genetically) to offspring.
What is the difference between acquired traits and traits passed on through natural selection?