Level 1: Mechanisms Vocabulary
Level 1:
Mechanisms Practice
Mechanisms Practice
Level 2: Speciation
Level 3: Cladograms Vocab
Level 3:
Reading Cladograms
Reading Cladograms
100
Different sexes compete to mate.
Sexual Selection
100
A male peacock shows off his big, bright feathers to attract a female.
Sexual Selection
100
What type of Speciation involves a physical barrier separating two groups across a large distance?
Allopatric Speciation
100
A diagram that shows evolutionary relationships over time.
Cladograms
100
Organisms that are closer together on a cladogram are ____________ (more/less) related.
More
200
A change in DNA that leads to new characteristics in a population.
Mutation
200
A group of black and white mice live on a black rock. When a nearby hawk flies over, it captures more white mice. The black mice population reproduces more over time.
Natural Selection
200
What type of speciation occurs when there is a resource barrier between two groups?
Sympatric Speciation
200
Organisms being compared on the cladogram.
Taxa
200
Which organisms have egg shells?
Lizard and Bird
300
The organisms that are the best suited for their environment survive to reproduce.
Natural Selection
300
A change in genetic code in a group of penguins creates an all white coat. This white coat penguin is now able to blend in with the snow, making it easier to hide from predators.
Mutation
300
A group of bats live together in the same cave. Some of the bats eat insects, while others only eat fruit. What type of speciation is this?
Sympatric Speciation
300
Part of the cladogram where each branch meets the main trunk. Represents the common ancestors.
Nodes
300
How many nodes are on this cladogram?
6
400
Allele frequencies change in a population due to random chance.
Genetic Drift
400
A few fruit flies get carried away to an island after landing on some bananas. Once there, they bring a new “red eyed” trait into the population that was on the island. Example of….?
Gene Flow
400
Two rodent populations became divided by the formation of a new lake in their habitat. What type of speciation is this?
Allopatric Speciation
400
The characteristics being compared between organisms on the cladograms.
Traits
400
What is the oldest organism on this cladogram?
Lancelet
500
A population migrates to combine with another population.
Gene Flow
500
A drought kills off half the flowers in a garden. Most of these are yellow. The garden continues to fill in the empty spaces with orange flowers of the same species. Example of….?
Genetic Drift
500
Two populations of squirrels live in the same tree. One group of squirrels lives in the top of the tree, while the other lives towards the bottom.
Evidence Gathered:
Why it Matters:
Type of Specitation:
Evidence Gathered: Two groups live in same tree
Why it Matters: Resource Barrier
Type of Speciation: Sympatric Speciation
500
Time on a cladogram goes ______ as you go up it.
forward/up
500
What traits does a salamander have?
Four walking legs, jaws, and Vertebral Column