Unit 1
What is evolution?
The changes in an organism over a period of time
What is natural selection?
the process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species. (nature)
What is fitness
Fitness is how well an organism can survive and reproduce in its enviornment
What is microevolution?
The gradual changes in a species
Last Universal Common Ancestor
Who made the theory of Evolution?
Darwin
What is artificial selection?
only individuals with desired traits are bred and reproduced. (humans)
How do mutations happen?
Errors in copying DNA, Errors in copying proteins, and environmental impacts like radiation
What is Macroevolution?
the massive evolution of a species
Evolution results from changes in
DNA, genetic material, etc
A species is
a group of similar organisms
True or False
Mutations are helpful, harmful, and neutral.
True
True or False
Gene Flow reduces genetic varitation in a population
False, increases
What is a body fossil?
a preserved shape of the organisms body (from the actual organism)
What is symbiosis?
the close relationship if two organism (whatever one organism does it affects the other
The changing of behavior or traits due to environmental changes.
True or False
Epigenetics can turn genes "on" and "off"
true
What is Genetic Drift?
The random occurrence of death in a species ends the DNA of that organism and therefore decreases variety.
What is a trace fossil?
what the organism left behind (footprints)
What is endosymbiosis?
one organism moves inside another
What is a fossil?
A fossil is the remanence of an ancient organism, whether its a bone or a footprint
What are the three factors of natural selection?
Competition, Variation, and overproduction
What is sexual selection?
the natural selection of mating. wether a female wants to procreate with a male
What is an embryo (HINT: its fertilized and has to do with a zygote)
a young organism that developed from a fertilized egg or zygote
What do proteins do? (list)