Practice Test Answers

A founding population of lizards arrives on an island. Which type of isolation would most likely result in this population becoming a new species?

In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils. What can be determined from this information?

Which is an example of temporal isolation?

Which factors affect natural selection?

Variations within a species are an important part of Charles Darwin's theory of evolution. Which example can be explained by individual variation?

What hypothesis did Darwin investigate by studying the breeding of pigeons with distinctive traits?

These notes were taken during a class about biological evolution, but the subject title is missing. -results from immigration -new genes brought into a population -variation in a population increases What do the notes describe?

Changes in the gene pool can occur due to various mechanisms. In 1989, a large oil spill occurred in Prince William Sound, Alaska, when the Exxon Valdez oil tanker ran aground. Approximately 11 million gallons of oil were spilled and spread 1,300 miles along the Alaskan coastline. The damage from the oil spill affected thousands of animals in the area, including killer whales, harbor seals, sea otters, fish, and sea birds. Which mechanism most likely affected the gene pools of the organism populations in the areas around the oil spill?

Carlos is collecting data about the length of earthworms in his backyard. The shortest worm he found is 4 inches long; the longest worm is 8 inches long. If most of the worms are either short or long, which type of distribution is displayed in the population?

Why do a chicken embryo and a cow embryo look very similar even though the adults do not?

Which is the best description of the two organisms highlighted in orange?

Osteichthyes is a group of fish that have the derived characteristics of jaws and true bones. Which letter corresponds to where Osteichthyes belongs on the cladogram?