Lesson 1: Darwin's Theory Answers

During a trip to the Galapagos Islands, which observation led Charles Darwin to suspect that organisms change over time?

Which best describes the relationship between evolution and natural selection?

Which would least likely be a cause of natural selection?

The map shows the allele frequency of sickled hemoglobin (HbS) and malaria endemicity in Africa. Which statement best explains the relationship between HbS allele frequency and malaria endemicity in Africa?

Natural selection is a process by which organisms that are better adapted to their environment tend to

A population of rabbits has individuals with fur coloring that ranges from white to brown. The population lives in a temperate deciduous forest where the summers are mild and average about 50°F. The winters are often below freezing. If warmer temperatures last longer into the fall and the average temperature in the winter is getting warmer, what do you expect to happen to the population?

According to the concept of “survival of the fittest," if a population of birds eats worms that they find deep under ground by using their beaks, which members of the bird population would be more fit?

Which organism exhibits behavioral adaptation?

Veronica wrote Charles Darwin’s main points on the board, but she made a mistake in one point.1. Since more offspring are produced than an environment can support, organisms within a population must compete for resources to survive.2. Due to variations within the population, some competitors will be better equipped for survival than others.3. The best-equipped organisms will survive and will produce well-equipped offspring. 4. Variations that help with survival will be passed on to future generations and will rapidly change the whole population.Which point is flawed as written above?

Consider this image of a gazelle.Which of the gazelle’s naturally selected traits is shown in this picture to be an evolutionary advantage?