Unit Test — Unit test Answers

Which best describes the fossil record?

Which best describes biogeographic isolation?

Which of the following is an example of reproductive isolation?

The frequency of alleles in a population that is in Hardy-Weinberg equilibrium

Which type of selection leads to increased phenotypic and genetic variation?

In four o’clock plants, there are three phenotypes for flower color but only two alleles. In one population, q2 = 0.169, and the population is assumed to be in Hardy-Weinberg equilibrium. The table below shows the number of plants of each phenotype that are expected in a population of 1,000 plants in the next generation.PhenotypeNumber expectedRed flowers105Pink flowers484White flowers411In the next generation, what p value is expected?

Which best illustrates a result of natural selection?

A male cardinal’s red color is an example of a trait affected by natural selection. The females of the species choose mates based on the vibrant colors of the males’ feathers. If females begin using different criteria than feather color when they choose mates, what would most likely happen to the color of the male cardinals over time?

A scientist is trying to determine the relationship between clams, snails, and squid. When she generates a molecular clock, she is surprised to see that clams and squid are more closely related than clams and snails. Which did the molecular clock data show?

Consider the generalized cladogram of fish.A fossilized fish is found that has jaws but no true bones. Where does this fossil belong on the cladogram?

Henry was studying two populations of the same species of lizards. One population lived on an island and the other lived on the mainland. Both populations were affected by a hurricane that hit the island and the mainland with equal force. A year later, Henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. Which best describes a conclusion he might have reached?

Scientists notice structural similarities between fossils of a land animal and an aquatic organism. They know the similarities are not a result of the two organisms having to adapt to similar environments. What can they attribute the structural similarities to?

A bird that preys on moths is introduced to the habitat with moths and trees like the ones shown below. What will most likely happen to the population of moths in this habitat?

Jezelyn needs to create a project that shows geographic isolation in action and decides to make a video. Which of the following would make the best project?

Consider the two male oryx that are shown below.Which of Charles Darwin’s main points is depicted in the image?