Natural Selection
When certain individuals in a population are better adapted to survive and reproduce than other individuals in the population.
What is natural selection.
Provides a record of past species and the transitional species that eventually got us to the current species on Earth.
What is the fossil record.
Any change in the allelic frequencies of a population that result from chance.
What is genetic drift.
What is a mutation.
Which population will see a decrease in number?
White rabbits or brown rabbits in the arctic.
What is brown rabbits.
For bonus...explain why.
Variation, Heritability, Overproduction, and Reproductive Advantage
What are the four principles of natural selection.
An early, prebirth stage of an organism that can show similarities between unlike organisms due to being evolved from a similar ancestor.
Ex) tail and pharyngeal pouches of a bird and mammal
What is an embryo.
When a physical barrier divides a population into two or more populations.
What is allopatric speciation.
The idea that states that allelic frequencies remain the same because the population is in genetic equilibrium.
What is the Hardy-Weinberg principle.
Which experiences evolution?
Communities, Populations, or Individuals
What are populations.
What is the famous island Darwin visited and the species of organisms he is most noted to have studied in coming up with the theory of natural selection?
What is the Galapagos Island and finches.
When one species evolves to resemble another species.
Give an example of allopatric speciation.
What are mountains, a lake, change in the river, lava flow, fault in the rocks, islands, etc.
A trait shaped by natural selection that increases an organism's reproductive success.
What is an adaptation.
During a directional selection, which group is selected AGAINST?
Night or day worms...birds eat worms during day, night worms can stay hidden.
When a farmer hires a detasseling crew to control which rows of corn can pass on their genes - this is not natural selection. What kind of selection is it?
What is artificial selection.
What is biogeography.
When one species gives rise to many species in response to a change in habitat.
What is adaptive radiaiton.
A structure that has no function or a reduced function in a current living species.
What are vestigial structures.
Which population would see a bigger impact from natural selection or genetic drift?
A population of 300 rabbits or a population of 30 rabbits.
For bonus, explain why.
Which principle of natural selection is described?
Thick furred polar bears on average have 3 cubs while think furred polar bears on average have 1 cub.
What is reproductive advantage.
The arm of a man, leg of a cheetah, fin of a whale, and wing of a bat.
What are analogous structures.
What is gradualism.
This allows an organism to blend in so that it has a better chance to survive and reproduce.
What is camouflage.
Explain what caused the finch population to evolve into 13 different species.
What is variation in beaks, drought that limited food sources, passing favorable traits to offspring that lived, etc.