Evidence of Evolution (original) Flashcards
(49 cards)
A change in an organism that makes it better suited to its environment.
Adaptation
The process through which species change over time through adaptations.
Evolution
The ability of bacteria to survive and grow in the presence of antibiotics.
Antibiotic resistance
The ability of pests to survive exposure to pesticides that once killed them.
Pesticide resistance
A species of moth that changed color due to industrial pollution, illustrating natural selection.
Peppered moth
The process where organisms better adapted to their environment tend to survive and produce more offspring.
Natural selection
The introduction of harmful substances or products into the environment.
Pollution
What are some types of evidence for evolution?
fossils,
anatomy,
embryology,
and biochemistry.
What is a fossil?
preserved remains of an ancient organism.
How can the age of a fossil be determined?
by relative dating and radioactive dating.
What is relative dating?
uses the layers of the Earth to approximate the age of a fossil.
What is radioactive dating?
uses Carbon-14 dating to provide the exact age of a fossil.
Where are the oldest fossils typically found?
at the bottom of the layers
What can be learned by examining the layers of fossils?
we can see how an organism has changed over time.
Which dating method provides an exact age for fossils?
Radioactive dating
Why is the arrangement of fossils in layers important?
it helps scientists understand the chronological order of organism changes over time.
what do fossils provide us evidence about?
Anatomy
an organisms habitat
what an organism eats
the bone and organ structure of an organism
Anatomy
structure that do not have a common evolutionary orgion
not similar in bone arrangement but similar in function
different ancestors
analogous
differnet function
similar structure
Homologous
Homologous and analogous structures help show if organisms are similar or different
evolutionary origin
structure in present day organism that no longer has a purpose, but was probably useful to ancestors
Vestigial structure
structure with a common evolutionary orgin
same bone arrangment same function or both
organisms share a common ancestor
Homologous structure
examples of vestigial structures in whales
pelvis and femur