A change in a DNA sequence that affects genetic information

An inherited characteristic that increases an organism's chance of survival

By looking at the genes of some animals we can determine which living species are most closely related to each other. This also reveals which species most recently diverged from their common ancestor.

Based on the partial gene segments shown, which pair of animals are genetically most closely related and therefore most recently diverged from their common ancestor?

Which rock layer contains the newest fossils?

Images of the embryo and adult stages of three different organisms are shown.

Which of the following is the best conclusion that can be drawn from this evidence?

Please select all correct answers that apply, based on the cladogram shown

In the table shown, the DNA found in five primate species was compared to the DNA found in humans. The number of sequence differences was recorded. Based on the data in this table, what inference could you make about these species compared to humans?

Researchers discovered that the legs of birds are homologous to the feet of reptiles. Which claim is BEST supported by this fact?

Select ALL the parts of Natural Selection.

What happens to new traits that HELP organisms survive over time?

What evidence presented here supports the argument that vertebrates and insects evolved from a common ancestor?

What does it mean that the eye structures and specific genes for those structures are analogous but the genes that control eye development are homologous?

Select all that apply

Sequence of DNA that determines structures of proteins

The ability to be unaffected by something usually harmful

Process in which traits become more/less common due to some traits making it more likely for individuals to survive and reproduce

What needs to be true for adaptation to occur?

Why/how do population change over time?

What does it take for organisms to change? Response should be in the correct order.

Why is it beneficial for a species to have varying traits?

Traits become more common in a population when it increases the probability of

Peppered moths were able to adapt to their environment because

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

All of the genetic information found in a population.

Hunting reduced the population size of the northern elephant seal to as few as 20 individuals at the end of the 19th century. Their population has since rebounded to over 30,000, but much have less genetic variation than a population of southern elephant seals that were not intensely hunted. How is the lack of genetic variation related to the hunting episodes of the 1800's?

Genetic Drift:

In Genetic Drift, both Genetic Bottleneck and the Founder Effect, the end result is

Cichlid fishes in lakes of the East African Rift. The lakes in this area are believed to support and sustain about 2,000 different species of these fish, each with different ecological and morphological characteristics such as body size. These lakes form a fragmented landscape that bio-geographically isolates the different species of cichlid fish from one another, allowing them, and many of the organisms they live with, to evolve separately.

In the frigid waters of the ocean surrounding Antarctica, fish have a special trait which allows them to survive the big chill. As scientists discovered in the 1960s, the fish have adapted by evolving a kind of antifreeze. It's composed of molecules called glycoproteins that circulate in the blood of the fishes, slightly lowering the temperature at which their body fluids would otherwise freeze and kill them. The glycoproteins surround tiny ice crystals and keep them from growing. The fish at the other pole of the globe also have a similar protein. It was, however, seen as a mutation after they had diverged from the southern species.

The Rough-skinned newt produces a potent neurotoxin that concentrates in their skin. Garter snakes, have evolved resistance to this toxin through a series of genetic mutations, and prey upon the newts. The relationship between these animals has resulted in an evolutionary arms race that has driven toxin levels in the newt to extreme levels.

The Apple Maggot Fly infests the fruit of a native North American Hawthorn Apple tree. In the 1860s some maggot flies began to infest apples. Now there are two populations of the fly feeding on the two food sources. The populations rarely interbreed and are showing genetic differences and therefore are becoming two separate species.

How is genetic drift different from natural selection?

What type of evolution is described in the following scenario: Porcupines in the United States have quills (spines) that are attached to their skins. When they feel threatened, they can tense up their bodies, causing the quills to “shoot out.” These spiny quills can pierce the skin of attacking animals, causing injury and pain. Although not closely related to the porcupine, hedgehogs that live throughout parts of Europe also have protective spines that they use to defend themselves from attacking animals.

What type of evolution is described in the following scenario: King Snakes are a family of snakes that usually eat other snakes in the wild. Even though many of the snakes they eat are very poisonous, King Snakes have adapted the ability to not be affected by their poisons. In response, some of these poisonous snakes, like rattlesnakes, have adapted other defensive behaviors (other than biting) to try and “scare off” the King Snakes.

What type of evolution is described in the following scenario: The flowers that bloom from the saguaro cactus have evolved a bright, white coloration to attract many of the bats they rely on to pollinate their flowers. Since they rely on the bats, they have also adapted to opening their flowers at night, when the bats are active. The bats have also adapted to the cactus by a.) developing the ability to hover above the flowers, and b.) developing a long tongue that can reach deep inside the flower.

What type of evolution is described in the following scenario: Chameleons, a type of lizard (reptile), have two eyes they can move in completely different directions, so they can see all the way around themselves. Sand lances are a type of fish that can also move their eyes like the chameleon, even though they are not related to one another.

What type of evolution is described in the following scenario: In the ocean surrounding Antarctica, there are fish that survive the cold water by using a molecule made of glycoproteins that circulates the blood and keeps it from freezing. Certain kinds of worms that live in the Arctic ocean also make antifreeze proteins that help them live in icy water

What type of evolution is described in the following scenario: A kit fox lives in the desert and has large ears with greater surface area that keep the fox from getting overheated. The red fox lives in the forest and has a red coat that keeps it camouflaged.

What type of evolution is described in the following scenario: The Galloti atlantica and Galloti galloti lizards evolved through natural selection from a common ancestor into a wide variety of different looking lizards.

What type of evolution is described in the following scenario: Bees don’t see red, but do see yellow, blue, and ultra-violet light. Thus, bee-pollinated flowers are mostly yellow or blue with UV nectar guides (landing patterns) to guide the bee.

All the animals to the right of the salamander would have the common characteristic of...

Survival of the fittest can best be described as –

Scientists can determine relatedness among organisms by comparing partial amino acid sequences. The table shows four partial amino acid sequences from four organisms. Which organism is the LEAST related to the other three organisms?

The relationships among different orders of millipedes are shown in the cladogram. Based on this cladogram, which statement best describes relationships among millipede orders?