Vocabulary
The process in which inherited characteristics within a population change over generations such that new species sometimes arise.
What is Evolution?
What is natural selection?
survival of the fittest
extinction is a natural event because the environment is always _____ It occurs because organisms cannot ____ to the changing environment.
changing, adapt
What are the 4 steps of natural selection?
Genetic Variation
Struggle to survive
Successful reproduction
a group that belongs to the same species and lives in the same area, and evolution happens in this.
population
Two or more individuals try to use the same resources, such as food, water, shelter, space, or light
What is Competition?
English naturalist who thought of the theory of evolution by natural selection?
Charles Darwin
Through ______ _______, the species that are unable to adapt to the environmental changes will be naturally removed.
natural selection
What are the examples of overpopulation?
no trees no parks and cars
True or False: Formation of new species over time is primates.
False
The trace or remains of an organism that lived long ago, not commonly preserved in sedimentary rock.
What is Fossil?
What are the evidence of evolution (there are 5)
offspring
gene
natural selection
adaptation
variation
There have been ____ mass extinctions on Earth Each one is followed by an explosion of ___ ______
4, new species
What is an example of favorable variation and unfavorable variation?
Favorable variation-skin color hair color
Unfavorable variation-flowers
The history of life documented by fossils
The fossil record
Any method of determining whether an event of objects is older or younger than other events or objects
what is relative dating?
When most of the animals living on the planet die out over a period of time?
mass extinction
body parts of organisms that are similar in structure is ______________.
homologous structure
Through starvation, disease, competition, and predation, some organisms die before adulthood, part of natural selection
True or False: Differences in physical characteristics between males and females of the same species is inherited variation.
False
What is the afarensis skull?
Hadar skull
The 4 causes of endangered species
human overpopulation
illegal hunting
habitat destruction
pollution
Body parts that perform a similar function but different in structure is _________. body parts that that have lost original function because of evolution is ______.
analogous structure
vestigial structure
In the successful reproduction-What are the two ways that organisms are considered "unfit"?
environment
survival
What are the 3 ways you can compare organisms?
skeletal structure
DNA
embryonic structure