Lab: Natural Selection-Standard Bio 4.2 — Unit test Answers

What will happen to the frequency of the recessive allele for the HbS gene when there is an outbreak of malaria?

Which of these are most likely homologous structures? bat wing dragonfly wing Tyrannosaurus arm

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

Consider the cladogram.According to the cladogram, which characteristic was used to separate bony fish from amphibians?

It can be seen on a cladogram that modern birds and reptiles share a common ancestor. Select the piece of evidence that best supports this idea.

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?

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?

Consider the generalized cladogram of fish.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?

Populations of organisms that exhibit a high degree of variation have a greater chance for survival than populations of organisms that show little variation. This statement is

Which factors affect natural selection?