FREE BIOLOGY AND STUDY GAMES ABOUT

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FREE BIOLOGY AND STUDY GAMES ABOUT

ADAPTATIONS&NATURALS EXAM QUESTIONS Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -41 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: A chance mutation causes a cheetah to be born with very short front limbs.What will be the most likely result of this mutation?

Answer:

The cheetah will not be able to run as fast.Question 2: The graph above shows the frequency distribution of a population of fish before and after scientists engaged in a breeding program over many generations.Which of the following explanations best describes the program?

Answer:

The average size of the population increased because the scientists selected for larger individuals.Question 3: In their first attempts to genetically engineer a cow that will make and secrete human growth hormones in milk, scientists found that they could insert the ..What is the best explanation of what will happen in a population of genetically altered cows?

Answer:

The cows will reproduce, but neither males nor females will reproduce the altered gene.

Question 4: Which of the following is best defined as the transfer of genetic information from one population to another?

Answer:

gene flow Question 5: Polar bears live in very cold climates. Which of the following adaptations most likely helps polar bears to survive the extremely cold temperatures of the Arctic?

Answer:

Polar bears have a thick layer of blubber under their skin.Question 6: Which of the following may have been an advantageous adaptation for the jackrabbit?

Answer:

I and II only Question 7: A particular environment has enough food to support 50 rats through the winter. At the end of winter one year, there are 25 female rats and 25 male rats. ..what will happen to this population of rats between fall and the next spring?

Answer:

The fifty rats best able to get and keep food will survive to reproduce next spring.Question 8: Which of the following processes is least likely to introduce variations into the genetic make-up of a population?

Answer:

mitosis Question 9: The woolly mammoth was a relative of modern elephants that lived in the cold northern parts of the world less than five million years ago..Which of the following sentences best describes how natural selection resulted in the woolly mammoth?

Answer:

Mammoths with thicker fur were more successful at surviving and reproducing in cold climates.Question 10: A family of white rabbits is transferred from a snow-filled ecosystem to a prairie.Which of the following adaptations would be most beneficial to the offspring of these white rabbits?

Answer:

darkening of the fur

Question 11: Which of the following best explains the variety of beaks found in finches on the Galapagos Island?

Answer:

Evolution through natural selection can increase the species diversity of an ecosystem.Question 12: Natural selection allows a species to change in response to its environment. What is the process by which a species becomes better suited to its environment called?

Answer:

adaptation Question 13: The vast majority of all species who have ever lived on earth no longer exist. Far more organisms have become extinct than are currently alive. Why?

Answer:

Species are continually being replaced or changed into other species by evolution. This process is currently very rapid compared to how long life has existed on earth.Question 14: Which of the following best describes why the two minnow populations evolved into separate species?

Answer:

Different selective pressures were acting upon the two populations, leading to an increase in genetic variation and the formation of two new species.Question 15: Which of the following adaptations is most likely to help an organism survive in an aquatic habitat?

Answer:

webbed feet

Question 16: A population of lizards lives on Island

• On nearby Island B, another population of the same species is present. ..The transfer of

genetic information that occurs between the two lizard populations above is known as

Answer:

gene flow Question 17: The graphs above show the difference between an initial population of colored lizards and the same population after 100 generations.Which of the following is the most likely explanation for the difference?

Answer:

Some change in the environment selected for red and blue lizards, but against green ones.Question 18: All species have a certain amount of genetic diversity within their populations.How is genetic diversity important to the concept of natural selection?

Answer:

Without genetic diversity, natural selection cannot occur.Question 19: The trees that grow in the rainforest can grow up to 130 feet tall. These trees usually have straight trunks that do not branch out until near the top. Most of the trees that grow in the rainforest also have

Answer:

smooth, thin bark that allows water to run off them more easily.Question 20: Certain traits can be passed from parents to their offspring. These are called heritable traits. Natural selection most favors the organisms whose heritable traits

Answer:

increase the number of their offspring who successfully reproduce.Question 21: Which of the following best explains how genetic recombination influences evolution?

Answer:

The genetic variation introduced during recombination provides new allelic combinations for natural selection to act upon.Question 22: Over the years, bacteria have become less sensitive to antibiotics used for medicinal and sanitation purposes. This lack of sensitivity is termed antibiotic resistance. How is antibiotic resistance an adaptation?

Answer:

The trait giving bacteria antibiotic resistance has become common, giving bacteria with the trait a selective advantage.Question 23: An animal has thick fur, padded paws, and small appendages. This animal is most likely to survive in _______.

Answer:

the Arctic