Vocabulary
Species change slowly over a period of time
Evolution
Who is the "Father of Evolution"
Charles Darwin
Artificial selection is determined by _________ forces
What is Human
Any adaptation to an organisms body. For example, a polar bear's thick fur in the arctic.
Physical adaptation
True or False: Evolution happens rather quickly and is noticeable through an individuals lifetime.
False. Evolution is a slow, gradual change in a species over time
A trait that helps an organism to survive in its environment
Adaptation
Differences in characteristics of individuals in the same species
Variation
Large peacock tails that are favored by female peacocks even though it makes them more vulnerable to predators is an example of
Sexual selection
Any adaptation in how organisms act. For example, wolves hunting in packs to tire their prey out.
What is Behavioral Adaptation
Without genetic variation a population Cannot evolve
True
A group of organisms so similar to one another that they can reproduce and have fertile offspring
A Species
The mechanism by which evolution occurs. Organisms that are better adapted to their environment are best suited to survive and successfully reproduce
Natural selection
Type of Selection that favors the middle trait and goes against the extremes. (ex: human birth weight)
Stabilizing Selection
A chimp uses rocks to smash open seeds to eat
Behavioral adaptation
True or False: A physical feature that is influenced by environmental factors can be passed on to the next generation (ex. dying hair)
False
all the organisms of the same group or species that live in a specific area
a Population
Since living space and food are limited (limited resources), offspring must fight for resources.
Competition
When one extreme trait is favored (ex: only the grey mice survive in a grey environment and all the white mice die off)
Directional Selection
A Giraffes long neck can help it reach food and fight for dominance
True or False: Populations evolve, individuals do not.
True
Parents pass on these traits to their offspring
Heritable Traits
In science, this idea is well supported by evidence and widely accepted as true among scientists.
Scientific Theory
Both extreme traits are favored
Disruptive Selection
A chameleon blending in with its surroundings
What is Camouflage
True or False: The environment can change an individual's genes in a single lifetime
False. The environment influences how common a genetic trait is within a population over generations because individuals with more favorable traits survive longer and reproduce more.