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

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?

Read this passage about global fishing.Global consumption of large fish has led to an exploitation of fish populations. Overfishing has led to a decline in the populations of many species of large fish including North East Arctic Cod. The graph below shows the decline in the cod population.As the human population grows and countries continue to develop, the demand for large fish has been steadily increasing. Unfortunately, the average size of the cod has decreased because the fishing nets were designed to catch the large fish and the smaller individuals could escape more easily.What is most likely happening to the genetic variation of the population of North East Arctic Cod?

Which factors affect natural selection?

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

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

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

A feature in the early hominid was her apelike shoulders and forelimbs, but a pelvis that indicated that most of her body weight lay above her pelvis. Which best describes the fossil?

The fossil record shows that the average size of black bears was large during cold glacial periods and got smaller during warmer time periods. What is this an example of?

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

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?

A primate species with a brain size of 1200 cc is discovered. From the information in the graph, what can be predicted about this species?

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

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

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?

Consider the brains of species A and species B to scale. Species A Species BSuppose that species A and species B have the same body size. Knowing this information, what can be determined from the pictures?

Fossils provide scientists with evidence that allows them to hypothesize how living organisms have evolved over time. Tiktaalik roseae was a unique organism that has been nicknamed the “fishapod” because it is believed to be a species had traits of both fish and tetrapods, the first four-legged animals.Which evidence would scientist use to make the connection between ancestry of fish and tetrapods using Tiktaalik roseae?

Which is an example of temporal isolation?