Research from various scientists dating back to the 1800’s contributed to the idea that is now known as the Theory of Evolution by Natural Selection. However, two scientists are credited for their work leading up to this theory? Which scientist is best known for developing the theory?

Which condition is essential for natural selection to result in a new species?

In the 1940s, the scientist J. B. S. Haldane linked many human red blood cell disorders with the tropical regions where malaria occurs. Haldane hypothesized that the widespread presence of these red blood cell disorders as well as traits that protect individuals from malaria were the result of natural selection. Haldane’s hypothesis was later confirmed by the research of A. C. Allison. The resistance to malaria carried by individuals in areas where malaria is widespread is the result of —

Which of the following is one way in which organisms such as clown fish and sea turtles are able to overcome the many dangers that their offspring encounter and ensure that their species population numbers stay relatively steady?

Speciation, a process in which a new biological species arises, occurs in stages and results in a species with an improved “fit” for its environment. Speciation can result when two populations have become –

Which of the following would most likely NOT cause a genetic change?

A bird species with all white feathers that was bred in captivity at the Central Florida Zoo produced offspring that have light blue feathers with dark linear designs. This mutation of feather color is most likely a –

Darwin’s theory of natural selection is often referred to as survival of the fittest. Which statement most accurately reflects "fitness" according to Darwin’s natural selection?

Crows living on the Northwest Pacific shore of British Columbia, Canada, eat whelks, large shellfish, by flying upwards to a height of five meters and dropping the snail-like mollusks on the rocks. The results of natural selection that this method of foraging for food best illustrates is –

Which of the following is the best statement about natural selection?

Which of the following cases best illustrates speciation from a common ancestor?

When the use of penicillin began during World War II, it saved thousands of soldier's lives. Today, treatment of many infections by penicillin, that were successful in the past, are no longer effective. What is the best explanation for this change?

Which of the following outcomes would you predict for a population of mosquitoes exposed to a new pesticide?

Two types of sedge plants grow in the region inhabited by the finches. One plant produces very hard seeds, the other a soft seed. Which statement best explains the relationship between the seed size and the bill width?

Global temperatures tend to change on a regular basis. The availability of environmental resources such as water and food tend to fluctuate on a regular basis as well. Individuals who are better able to cope with such challenges in their environment tend to –

A bird species with all white feathers that was bred in captivity at the Central Florida Zoo produced offspring that have light blue feathers with dark linear designs. This mutation of feather color is most likely a –

The concept of gene flow is demonstrated when a cow is driven off from its herd, joins another herd, and reproduces. When the cow contributes to the gene pool of the new herd, which of these most likely increases?

Two populations of mice living in the same forest are separated by a large water-filled ditch. After a rainstorm, flooding brings several mice from one population to the other population. When the mice from the first population reproduce with members of the second population, which of the following will likely occur?

Which of these factors should be compared to best determine how closely species are related to each other?

The fact that all organisms use DNA for their genetic material is evidence that all organisms —

When barnacles attach themselves to a whale, the whale is not usually positively or negatively affected. The movement of the water past the swimming whale carries food particles to the barnacles. This situation is an example of –

Mistletoe grows on the branches of an oak tree and penetrates the bark to obtain nutrients. This type of interaction is –