Natural Selection 1
Why did the dark mouse population increase over time?
The hawks eat more light mice than dark mice because they can see the light mice more easily
Which best describes the role of mutations in natural selection?
A mutation may result in a beneficial trait that makes an organism more likely to survive and reproduce
The more genetic variation a population has, the more likely it is for some individuals to
Survive
All rabbits of the same species living in a particular area would be an example of a(n)
Population
Why is competition important for natural selection?
It shows which variations are more successful, allowing the organisms with those variations to survive.
The trees moths used to live on were white, but have been covered in soot from coal factories. Which moth will be more successful in this environment?
Dark Moth
The difference between a moth's wings is an example of what?
Variation
What causes variation?
Your genes and your environment.
The fact that all organisms have DNA as their genetic material is evidence that:
All organisms may have descended from a common ancestor
What eventually happens to a species when the environment changes and the organisms do not adapt?
Extinction
Fossilized coral reefs, fish, and other warm-water marine creatures have been found in mountainous regions of New England. Which of the following best explains how this could have occurred?
The climate and geology of this area have changed over time.
How, according to natural selection, is the evolution of long necks in giraffes best explained?
Giraffes with longer necks survived because they were better suited to the environment.
Index fossils help scientists estimate the age of a rock because index fossil species only existed for a relatively short time. What happened to the species that are now used as index fossils?
They became extinct.
Who studied organisms in the Galápagos Islands and deleveloped his theory of biological evolution?
Charles Darwin
What are the 3 animal adaptations?
Structural, behavioral and physiological
The light mice blend into the light sand and the dark mice blend into the volcanic rock. What is camoflauge?
A structural adaptation that enables species to blend with their surroundings.
What are the 3 structures of organisms?
Vestical, analogous & homologous structures
What are the 3 types of organism behaviors?
Hibernation, migration & dormancy
What is competition?
An ecological relationship in which multiple organisms of the same species or different species are fighting for the same resources
What is predation?
an ecological relationship in which one species, the predator, feeds on and often kills another organism, the prey.
What is commensalism?
Where one benefits and the other is unaffected.
What is parasitism?
Where the organism benefits and the host is harrmed.
What is mutualism?
A relationship in which 2 organisms benefit.
What are the 3 different types of species?
Native, endemic & indigenous species.
What are non-native species?
A type of species that has been introduced to an ecosystem accidentally or intentionally.