The Study of Life
Evolutionary Evidence
Tree of Life
Forces of Change
Speciation
100
What do we call the ordered steps that a scientist takes to investigate a phenomenon?
Scientific Method
100
What are the preserved remains of ancient organisms, which provide a timeline of life on Earth?
Fossil record.
100
What do we call a group of organisms that can interbreed and produce fertile offspring?
Species
100
What do we call the process by which organisms with traits better suited to their environment are more likely to survive and reproduce?
Natural Selection
100
What concept bases the separation of different species on how they look?
Morphological species concept
200
What is a proposed explanation for a phenomenon that can be tested?
Hypothesis
200
The farther away you are (in location), the more likely you are to look different from a closely related species
Biogeography
200
On a phylogenetic tree, this represents the most recent common ancestor of all the organisms on the tree
Node
200
Any factor, such as predators or limited food, that restricts growth or survival of a population
Selection Pressure
200
A type of speciation that occurs when a population is geographically separated from the rest of the species
Allopatric speciation
300
Rachel wants to test how many jokes she can make before one of her students tells her she's uncool. What is the independent variable?
The amount of jokes she makes.
300
What is a vestigial structure?
A body part that no longer has a function in the current organism
300
What do we call the single cell from which all life is descended?
LUCA (Last Universal Common Ancestor)
300
The random change in allele frequencies within a population due to chance events, especially in small populations
Genetic Drift
300
A type of isolation in which two species mate at different times of the day or the year
Temporal Isolation
400
Scientists want to test if their new medication works on patients. What would be the BEST control group?
Patients that receive a placebo pill.
400
What type of anatomy is this image representative of?
Analogous Structures
400
List the classifications of Linnean taxonomy in order from big to small.
Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
400
An earthquake killed most of the population of bears in a forest. What type of genetic drift is this?
Bottleneck Effect
400
What determines MOST specifically if two organisms are different species?
If they cannot reproduce with each other
500
What are the six characteristics of life?
Homeostasis, metabolism, having cells, reproduction, growth and development, response to environment
500
How analogous structures provide evidence for evolution?
They show that similar selection pressures create similar outcomes.
500
What trait(s) does the MRCA of antelopes and alligators have?
Lungs and Jaws
500
What's the difference between gene flow and genetic drift?
Gene flow: two or more populations intermingle (increases allele diversity+)
Genetic Drift: population size dramatically reduced (decreases allele diversity)
500
What would speciation look like on a phylogenetic tree?
Node/Branch