Which of the following is NOT true in the formation of a new species?

You are researching reptiles and encounter two garter snakes on a hike. Both snakes are brown and white, but their patterns are slightly different. You bring them back to the lab for further study. What is the BEST way to determine if these two are the same species?

If a population becomes isolated from other populations of the same species and then genetic differences start to occur, what happens?

What type of isolation has occurred in the image?

What type of isolation has occurred in the image?

A population of fruit bats is active at night. Part of the population is most active from 8pm to midnight, and the rest of the bats eat from 1am to 5am. Eventually, the bats don't interact with each other at all. What type of isolation is this?

When the Grand Canyon in Arizona formed, two populations of one squirrel species were separated by the giant canyon. This is an example of _____________.

What do we call a group of individuals that can reproduce successfully in nature?

A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of isolation is this?

Some female peacocks prefer males with large, colorful tales while other female peacocks prefer males with no tail at all. Females are beginning to only mate with the type of males with the tail they prefer. What type of isolation is this?

individuals with alleles for an extreme type are more likely to survive and reproduce

the selection pressure favors the extreme phenotypes, dividing the population into 2 distinct groups

Individuals with intermediate traits are more likely to survive and reproduce

Tall kelp have a distinct advantage over shorter kelp in receiving needed sunlight in their ocean environment

Aspen trees that are over 25 m tend to blow over in high winds; aspen that are under 15 m don't get enough sun

male elk use their antlers and size to compete with each other for the ability to mate with female elk

snails with a forward spiral and snails with a backward spiral have an advantage in their environment

Fish that produce 40,000+ eggs have greater fitness than fish that produce less than this number

On average, human newborns weigh 7.2 pounds.

Ground finches born following a severe drought tend to have larger beaks (on average) than the previous generation.

Light-colored oysters would blend into the rocks in the shallows, and the darkest would blend better into the shadows. The ones in the intermediate range make them easier prey.

Having a very high birth weight or a very low birth weight increases the mortality rate of human babies. What type of selection may occur over time?

The small seeded plants in an area were killed by a fungus. Finches with a small beak cannot crack open the large seeds from the plants that were left. What type of selection is likely to occur?

A fire has wiped out the vegetation that produces medium sized seeds. As a result, the finches left can feed on seed that are available in two sizes: small and large. What type of selection is likely to take place in this population?

In Canada, the people have overfished the salmon in a particular river. They catch the larger salmon and throw the smaller salmon back into the river. Over time, what type of selection is likely to take place?

In a forest in Germany, there is a rat who has three fur coat colors: a light creamy color, a medium tan color, and a dark brown color. In this particular forest, the floor is a medium brown and the intermediate tan color mouse is better camouflaged.

A population of rabbits has three fur colors: white, gray, and black. After volcanic activity, the terrain changed and now the rabbits now live on white rocks and black rocks. What type of selection is likely to occur?

In interglacial periods in Europe, black bears body sizes got smaller. In the glacial periods in Europe, black bears body sizes got larger. What is this type of selection?

Which of the following is an example of the bottleneck effect?

All of the genetic information found in a population.

A change in allele frequency following a dramatic reduction in the size of a population (like a catastrophe)

Change in allele frequencies as a result of the migration of a small subgroup of a population

Group of organisms all of the same species, living in the same place at the same time.

The process in which an animal cannot reproduce any more and dies out is known as _________________________.