Natural Selection
The process where organisms better adapted to their environment tend to survive and produce more offsprings is called ________
Natural selection
What is Artificial selection?
The process by which humans breed plants or animals for specific traits.
What does “survival of the fittest” mean?
The idea that individuals best suited to their environment survive and reproduce.
Is breeding corn to be sweeter an example of natural or artificial selection? Why?
Artificial selection because humans select the traits to be passed on.
Mutation
An error or a change in the DNA of an organism.
The scientist known for the theory of natural selection
Charles Darwin
Name one example of artificial selection in animals.
Breeding dogs, or dairy cows, or chickens for more meat/eggs
Many answers - need to be phrased as a question!!
What is example one trait that might make an animal more “fit”?
Camouflage, speed, sharp teeth, height etc.
Antibiotic-resistant bacteria are an example of what kind of selection? Why?
Natural selection because the bacteria not impacted by antibiotics survive and reproduce.
Speciation
One species split into two different species
The three main criteria for natural selection
Variation in population, inheritable traits, limited resources
How is artificial selection different from natural selection?
What is artificial selection is guided by humans, while natural selection happens without human interference?
A giraffe with a longer neck survives better. Is this natural or artificial selection, why?
Natural selection because humans are uninvolved and it is a trait of fitness that helps them survive.
Wild moths changing color to blend in with soot during the Industrial Revolution—what kind of selection? Why?
Natural selection. Moths which can camouflage survive and reproduce.
Gene flow
The mixing of genetic information among interbreeding members of a population or species
True or False: Natural selection always leads to the perfect organism.
False
True or False: Artificial selection can happen in wild ecosystems.
False
What might happen to a population if the environment suddenly changes?
Some may die and others may survive if they have helpful traits.
If farmers choose the biggest tomatoes to plant seeds from, what type of selection is this?
Artificial selection
Another name for artificial selection
Selective breeding
The name of the famous islands where Darwin studied finches?
Galápagos Islands
Why might artificial selection cause problems in a population?
Reduced genetic diversity or increased health issues.
Why is variation important in natural selection?
It allows some individuals to survive changes in the environment. If there is no variation, all will die or all will survive.
Which selection type can lead to evolution over many generations?
Both, but especially natural selection.
Type of reproduction which is more important for variation in population
Sexual reproduction