How does the concept of survival of the fittest relate to natural selection?

The Ambystoma salamanders of northeastern North America, an all-female species, reproduce asexually through cloning. They have evolved to incorporate DNA from other salamander species into their own DNA. What is the primary benefit of this DNA incorporation from other species for these Ambystoma salamanders in adapting to environmental changes over millions of years?

The fossil record shows that a certain type of marine invertebrate remained relatively unchanged for millions of years before undergoing a sudden burst of evolution. Which theory of evolution best explains this phenomenon?

Based on the cladogram, choose ALL the species that would have hair.

When farmers use pesticides on their crops, some insects are naturally immune to the toxins. How does this immunity in a small number of insects lead to the pesticides becoming less effective over time?

Ancient fossilized remains of horned sheep have been found in Arizona. When the remains are compared to modern horned sheep it can be seen that the modern ones have much larger horns. Which question would BEST help determine whether the change in horn size was influenced by natural selection?

A group of researchers observed a sudden change in the characteristics of a species in the fossil record, followed by a long period of little to no change. This pattern is most consistent with which evolutionary theory?

A phylogenetic tree is shown. Which numbered location on the phylogenetic tree identifies characteristics shared by Species B, C, D, E, and F?

Many of the species that exist today have the adaptation of the organism laying hundreds to thousands of eggs at one time. How does this adaptation increase the fitness of an organism?

As bees fly from flower to flower collecting nectar, they will carry pollen from flower to flower which is known as cross-pollination. This cross-pollination of flowers from different populations of the same species will most likely result in —

Monarch butterflies are known for their unpleasant taste, which deters predators. The viceroy butterfly, which closely resembles the monarch, also benefits from this. How does this resemblance to the monarch butterfly benefit the viceroy butterfly?

Off of the coast of South America there are several islands that are each home to a slightly different species of Finch, which is a small bird. Based on this information, what conclusion can be drawn about the evolution of these species?

Scientists uncovered layered fossils of a species of mollusks with a particular pattern. The most likely explanation for this pattern is that smaller mollusks were originally well adapted to their stable environment and did not change for millions of years so all of the fossils were small. Then a large, sudden change occurred in their environment. After the change the mollusks with bigger shells were better adapted for the new environment resulting in all of the fossils from that point on being large. This explanation describes what type of evolution?

Chameleons are known for their ability to change skin color. What is the primary reason for this adaptation?

What is the term for the process by which characteristics that improve an organism's ability to survive and reproduce are passed on to the next generation?

Leopards in Bolivia were nearly hunted to extinction. Due to this, the leopards in that country started to be born with a lot of birth defects from inbreeding. To counter this, leopards were brought in from Panama and released into the wild. Which statement best describes the impact of gene flow on the Bolivian leopards population after the introduction of the Panamanian Leopards?

How does a beneficial trait or adaptation contribute to their survival and reproductive success of an organism?

Select the term that best describes the transfer of alleles or genes from one population to another.

A certain species of pine trees are found all across the western coast of North America. As global temperatures have risen over the last several decades, the pine trees in the southern regions, where the temperatures are warmer, have started to die out. The pines in the cooler north are growing and reproducing. Which statement best describes what is happening to the pine tree population?

Hares are a typical prey for foxes. How could an increase in the speed of hares affect the typical speed of foxes after several generations?

Finches on the Galapagos Islands have different beak shapes depending on their diet. Birds with large, strong beaks eat hard seeds, while birds with long, thin beaks eat insects. What evolutionary process is responsible for this adaptation?

Some species of frogs in the rainforest have developed bright colors as a warning to predators that they are poisonous. How does this adaptation benefit the frogs?