Please help by answering each question with the correct option answer
1. A population of 1,000 wild turkeys is studied and observed by scientists on an island. The scientists construct a study over five years to observe the temperature, amount of precipitation, daily value of berries individually consumed that were their exclusive food source, and available habitat for nesting. The scientist determined that as the climate changed, the population began to decrease.
Using the Hardy-Weinberg Equilibrium as a null hypothesis, which of the following observations made by the scientists would support an associated alternative hypothesis?
A) Due to the climate change, some birds may emigrate to a cooler location that would lead to a variation in the gene frequencies within the population.
B) Variations in gene frequency due to advantages in natural selection would cause a greater number of males in the population to have more desirable traits.
C) An increase in food consumption would cause the population to begin to exceed the carrying capacity that leads to a variation in the gene frequencies within the population
D) Variations in gene frequency due to the geographic isolation would cause mutations in offspring, making them able to consume a different food source not observed through the study.
2.In a species of lily, the color of the flower’s petals is determined by a dominant purple allele (F) or recessive white allele (f). One hundred flowers in Hardy-Weinberg equilibrium were sampled, and only 15% of the population showed the phenotype of white.
Which of the following numbers represents the calculated value of the recessive white allele frequency?
3.After the glacial retreat at the end of the last ice age, some three-spine stickleback fish (Gasterosteus aculeatus) were isolated in small lakes. A mutation occurred in these fish that resulted in the loss of pelvic spines. Today, all freshwater sticklebacks lack pelvic spines, but are still classified as members of the same species as marine sticklebacks.
Scientists collected sticklebacks from both marine and freshwater environments and placed them together in a controlled environment. Which of the following statements describes the effect of the mutation on their ability to interbreed?
A) They should be able to interbreed and produce fertile offspring.
B) They will not be able to interbreed and produce offspring because of hybrid breakdown.
C) They will not be able to interbreed and produce offspring because of mechanical isolation.
D) They should be able to interbreed and produce offspring, but the offspring may experience reduced hybrid fertility.
4.Scientists are examining the possible role of a large asteroid in the Cretaceous mass extinction event. A large asteroid strike would likely have caused rapid climate cooling and diffusion of sunlight.
Which of the following statements are the best null and alternative hypotheses when scientists look at the geologic evidence of extinction related to the asteroid strike?
A) Null: The rate of extinction would be steady over the entire length of time the climate was altered. Alternative: The rate of extinction would be greatest immediately before the asteroid strike.
B) Null: The rate of extinction would gradually decrease over the entire length of time the climate was altered. Alternative: The rate of extinction would be at its lowest immediately after the asteroid strike.
C) Null: The rate of extinction would be steady over the entire length of time the climate was altered. Alternative: The rate of extinction would be greatest immediately after the asteroid strike.
D) Null: The rate of extinction would gradually decrease over the entire length of time the climate was altered. Alternative: The rate of extinction would be at its greatest immediately after the asteroid strike.
5.Mongooses are not native to Hawaii. They were intentionally introduced on all of the islands in 1883 by sugarcane farmers to control rat populations on sugar plantations. They have since greatly increased their population on some islands, while no populations of mongooses are found on the islands of Lana’i and Kaua’i. Which of the following correctly identifies a challenge mongooses would face if they were introduced onto these two islands?
A) There is a lack of rats and other food sources on these islands.
B) These two islands have no forest reserves compared to the other islands.
C) These islands contain no natural predators for mongooses so they would overpopulate.
D) These two islands contain native species of birds and reptiles that would compete with the mongooses.
6.In the early 1800s, potatoes became the main food staple for the people of Ireland. In 1845, a fungus native to South America, Phytophthora infestans, began to infect potato plants, causing potato blight and making the tubers inedible. Over the next several years, most of the potato plants in the country were destroyed by this invasive species.
Which of the following statements correctly explains why the Irish potato famine occurred?
A) The arrival of ships from South America led to human introduction of the disease.
B) A drought across Ireland in 1844 led to more damaged potato plants that were susceptible to infection.
C) An increase in trade with other European countries led to the introduction of plants that were already infected with the fungus.
D) Ireland’s climate became closer to that of South America, which allowed the fungus to infect potato plants and reproduce.
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