The movement of alleles into a population is an example of , and variation as a result.
The movement of alleles into a population is an example of , and variation as a result.
When there is a sudden, dramatic decrease in the population, this is an example of , and variation as a result.
When a small population is isolated, then starts a new colony, this is an example of , and variation as a result.
A small population of ladybugs is separated from the rest of the population, then start a new colony on a different tree.
This is an example of , and variation as a result.
The blue birds on one side of a river fly across the river and mix their genes with the red birds on the other side of the river.
This is an example of , and variation as a result.
A volcano erupts and kills almost all of the seals in a population.
This is an example of , and variation as a result.
The population of Western deer move into the population of Eastern deer and mix genes.
This is an example of , and variation as a result.
The Indian Ocean tsunami caused one of the largest natural disasters in recorded history, killing an estimated 228,000 people across 15 countries. This catastrophe struck at random and killed many individuals irrespective of the genes they carried.
This is an example of , and variation as a result.
A forest fire kills off a large part of the population of squirrels in a forest. Most of the red-tailed squirrels are killed off, leaving mostly white tailed squirrels behind.
This is an example of , and variation as a result.
The Afrikaner population in South Africa came from a few colonists that settled there hundreds of years ago.
Today, the Afrikaner population has an unusually high frequency of the gene that causes Huntington’s disease. Scientists believe this is because the original colonists who settled in this new colony carried the gene with high frequency.
This is an example of , and variation as a result.
In Antarctica, there used to be 4 different allele variations of seals: those with brown fur, white fur, gray fur, and black fur. Seals with gray fur and black fur were hunted in the 1800s in order to make dark fur coats.
This is an example of , and variation as a result.
In a forest, beetles with flat legs stay on the ground, while beetles with hooks can climb trees. A certain predator eats beetles close to the ground. Over time, the frequency of beetles with hooks increases in the population, while the frequency of beetles with flat legs decreases.
Which mechanism of evolution explains the change in allele frequency in the population?
Sub-Saharan Africa is home to many different species of big cats.
One example is the West African Lion and the Congo Lion. While the two species may look similar, they are not the same species. The West African lion is the fiercest lion and will chase down elephants and buffalo in packs. Congo lions instead choose to climb up trees to rest and wait for antelope or zebra to pass before dropping down to ambush them.
Aside from different hunting patterns, these lions also have different manes. West African lions have shorter manes, while Congo lions have longer, thicker manes. These two species are not capable of reproducing with each other.
This is an example of speciation because .
On the Galapagos islands, there are two different species of iguanas. While they may have both come from the same ancestor, they were separated by the Pacific ocean as new islands began to form. The Pink Iguana is found only on Wolf Volcano on Isabela Island. The Pale Land Iguana is found only on Santa Fe Island. These two iguanas are on different islands and can no longer interbreed.
This is an example of speciation because .
