17. A fruit fly that has a short life span, produces many offspring, and spends little energy raising their young can be classified into which reproductive strategy? A. r-strategist B. a carrying-capacity strategist C. k-strategist D. a logistic strategist

Use the information to answer the following question. Some species of sea stars are able to reproduce both sexually and asexually. Increasing ocean temperatures have impacted the environment of sea stars around the world. Which argument provides the MOST LIKELY explanation for why populations that use sexual reproduction will demonstrate increased survival than those that use asexual reproduction? A. The population that uses sexual reproduction will be able to reproduce at a faster rate and replace the individuals that do not survive new environmental conditions. B. The population that uses sexual reproduction will reproduce at a slower rate allowing for them to identify and adapt to the new environmental conditions. C. The population that uses sexual reproduction will have less genetic diversity which will allow them to adapt to the new conditions more quickly. D. The population that uses sexual reproduction will have increased genetic diversity which will allow the population to…

Does Totoaba offer any ecosystem benefits? I know their demise is causing the Vaquita to go extinct due to illegal poaching, however, are Totoaba themselves important? Essentially, if Totoaba went extinct, what would happen? *This question is being asked for personal knowledge, not for any school assignments!

A federal agency has put you in charge of devising responses to the invasion of zebra mussels and quagga mussels. Based on what you know from this chapter, how would you seek to control the spread of these species and reduce their impacts? What strategies would you consider pursuing immediately, and for which strategies would you commission further scientific research? For each of your ideas, name one benefit or advantage, and identify one obstacle it might face in being implemented.

In 1955, conservationists in Hawaii were concerned about an invasive species, the giant African land snail, Achatina fulica. A. fulica was reproducing widely and had few predators. In an attempt to control the invader and protect the environment, the conservationists imported the rosy wolf snail, Euglandina rosea (E. rosea), that preys on other snails for food. Which of the following explains what will most likely happen to A. fulica? Why? E. rosea quickly becomes the top predator, instead of A. fulica. The number of A. fulica decreases. A. fulica and E. rosea become competitors, but A. fulica remains the top predator. The number of A. fulica stays constant. A sudden genetic mutation in A. fulica causes them to become smaller and more attractive to E. rosea. The number of A. fulica decreases. Natural selection causes A. fulica to grow bigger, be more aggressive, and eat more snails, including E. rosea, over time. The number of A. fulica increases.

In the Introduction, the authors set the stage for their experiment. What ecological issues were facing Yellowstone National Park when wolves were no longer there, and how were the researchers going to test the questions they wanted to ask?   In 4 – 6 sentences, summarize the Methods section of this paper. One of the questions the researchers asked when they began their experiment was “With wolves now back on the Yellowstone landscape for 15 years, how has the reintroduction of wolves affected the recruitment of the woody browse species?” Use data from the Ripple and Beschta paper to support your answer.   In any scientific paper, the Discussion is often the most hard-hitting, and where researchers elaborate and explain their results in the context of their experiment and the real world. Explain why when researchers tried culling some of the elk herd it did not have trophic effects, while reintroducing wolves did have trophic effects.   Describe the multiple impacts of wolf…

Classify the following scenarios with the appropriate term regarding different types of reproductive barriers. a.   One species of owl is diurnal (active in daylight) and another is nocturnal (active at night)________________________ b.The blue footed booby will only mate after a male displays their bright blue feet_________________________ c. The hybrid offspring of a horse and donnkey is sterile___________________________________         2. Use the diagram to the right to answer the following questions. c.Which letter (A, B, or C) represents the original population of fish? b.Which letter represents allopatric speciation? Explain your answer. c.Which letter represents sympatric speciation? Explain your answer.

You are examining a population of C. elegans in their natural habitat, a fresh steaming pile of nutrient-rich compost.  Predict what you might expect to see in terms of mode of reproduction in the population.    a. The population will primarily reproduce asexually then when they run out of nutrient-rich compost.    b. The population will have mostly hermaphrodites with a few males.   c. The population will have a really high frequency of males compared to lab conditions.   d. The population will primarily undergo sexual reproduction.

QUESTION 20 Reintroduction of the wolf eventually reduced attacks on domestic cattle by what other species?   a. Fox   b. Local wild dogs   c. Grizzly bear   d. Golden eagle   e. Coyote

6 The following question has two parts. First, answer Part A. Then, answer Part B. Part A: Which statement is a valid analysis about bison movement and the carrying capacity of Yellowstone National Park? A. The decrease in the northern herd's population is explained by its inability to migrate and the park's decreasing carrying capacity.   B. The fact that bison only migrate in years of deep snow indicates that they have exceeded the park's carrying capacity.   C. The carrying capacity for other animals found in Yellowstone has increased due to the bison's migration outside of the park.   D. The movement of bison beyond park boundaries is not due to the bison population being too large for the park's carrying capacity.         Part B: Which selection from the text provides evidence that directly supports this analysis? A. They move to lower elevation ranges during the winter months in response to snow accumulation and snowpack…