Unit 8 Flashcards
What is a structure called if it does not have a function?
Vestigial
When an organism that is best fit for the environment survives, then reproduces and passes on its DNA to its offspring. This process describes what theory?
Natural Selection
When comparing two structures, if they have the same design but a different function, what does that make them?
Homologous
When comparing two structures, if they have a different design but the same function, what does that make them?
Analogous
The ship that Darwin traveled on during his explorations was named the ___.
HMS Beagle
The evolutionist that was the author of the Theory of Natural Selection was ___.
Darwin
Scientists have discovered several species of insect that all contain the DNA sequence ATTACGCHATC on their second chromosome. What does this evidence suggest?
Common ancestry among organisms.
The struggle between organisms to survive in a habitat with limited resources would be considered ___.
Competition
What is an example of an environment in which natural selection would NOT occur?
All offspring have the same chance of survival.
Archaeopteryx is thought to be the first fully feathers dinosaur. How does this piece of evidence support the theory of evolution?
It suggests that birds and dinosaurs have a common ancestor.
What is a fossil?
A trace of an ancient organism that has been preserved in rock.
When humans determine what organisms get to reproduce inside of a specific species, this is called ___?
Artificial Selection
The blind mole rat is a species that has eyes that are completely covered up with layers of skin. This is an example of what type of structure?
Vestigial
Which of the following structures would be homologous with a dolphin fin?
Bat Wing
Which of the following structures would be analogous with a dolphin fin?
Fish Fin
