Biogeographic Isolation-Standard Bio 4.5 — Unit test Answers

Horses and zebras can be bred to produce a zorse, which is infertile. Which is most likely the reason zebras and horses are considered separate species?

Evolution is change in a population over time and includes the gene pools of that population. How does biogeographic isolation allow for the change of gene pools over time?

A student has written a paper about a deer population that was separated when a canyon developed between members of the group. In her paper, she showed that the two groups adapted differently and can no longer interbreed. What would be the best title for her paper?

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?

Thylacosmilus is a marsupial, and Smilodon is a mammal. Thylacosmilus and Smilodon both have saber teeth, but they do not share an ancestor that had saber teeth. What are saber teeth for these organisms?

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

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?

Which of the following best defines a gene pool?

Which best describes the fossil record?

Why are the Miller-Urey experiments essential to the theory of evolution?

Which best describes biogeographic isolation?

A biology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. Which is the least supportive example?

Babies with very low or very high birth weight are less likely to survive. The graph shows the percentage of babies born at different weights.Which statement is a valid claim that could be made using the data in the graph?

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?

Which of the following is an example of reproductive isolation?

Which graph represents selection that may lead to reduced variation in a population?

What is the most likely reason that horses and mountain goats have hooves?

Imagine a population of rabbits with fur color that ranges from black to white. If this population were put in an area that has dark rocks that camouflage the black rabbits, as well as light stones that hide the white rabbits, what would most likely happen to the gray rabbits?

In Wisconsin, a very large population of lake trout, in which individuals mate at random, experiences no migration, mutations, nor selective pressure for a number of years. Which of these is most likely to occur in the population?