Evolution
A diagram that shows the evolutionary relationships among different species.
What is a cladogram?
A trait found in the line of descent but not in the common ancestor.
What is a derived character?
Structures with the same evolutionary origin, but different functions.
What are homologous structures?
The variety of dog and cat breeds that we have today is a product of _________ _____________.
What is Artificial Selection?
These structures have similar functions but evolved independently in species with different ancestors
What are analogous structures?
Groups of organisms in a cladogram.
What are clades?
A group of organisms that look alike and can reproduce
What is a species?
Evolution can only occur if this is involved
What is Genetic Variety?
The idea that only those organisms best suited to their environment will survive.
What is survival of the fittest?
A trait that many organisms in a family or lineage share because they inherited it
What an ancestral character?
This type of natural selection occurs when certain traits increase an individual's chances of attracting a mate, even if they don’t help with survival.
What is sexual selection?
Two different organisms are alike, they share this in their bloodline
What is a Common Ancestor?
A little child catches a fly and pulls its wings off. The fly actually lives a better life, but does not pass its lack of wings on to its offspring because the loss of wings is an _________ _______.
What is an Acquired Trait?
This type of adaptation includes traits like a camel’s hump or an eagle’s talons that help an animal survive in its environment.
What is an example of Physical Adaptation?
Scientists use this branch of biology to compare the early development of different species and find evidence of common ancestry.
What is comparative embryology?
Similarities in DNA sequences among different species used to determine shared ancestry.
What is molecular biology?