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- On one acre of land, annelids can process about ____ pounds of soil a year. O 16 O 2,000 O 16,000 O 1,000,000Sustainable Use of Horseshoe Crabs Horseshoe crab blood clots immediately upon exposure to bacterial toxins, so it can be used to test injectable drugs for the presence of dangerous bacteria. To keep horseshoe crab populations stable, blood is extracted from captured animals, which are then returned to the wild. Concerns about the survival of animals after bleeding led researchers to do an experiment. They compared survival of animals captured and maintained in a tank with that of animals captured, bled, and kept in a similar tank. FIGURE 24.28 shows the results. FIGURE 24.28 Mortality of young male horseshoe crabs kept in tanks during the 2 weeks after their capture. Half the animals were bled on the day of their capture. Control animals were handled, but not bled. This procedure was repeated 8 times with different sets of horseshoe crabs. In which trial did the most control crabs die? In which did the most bled crabs die?Single-celled algae live in the tissues of coral animals. The algaeprovide food for the coral, while the coral provides a stable homefor the algae. a. parasitismb. commensalismc. mutualism
- Bengal Tigers that has its own territory let’s say it’s brings home food, a predator like another tiger or wolf as they try to steal the food but was killed by the territorial tiger. Will tiger eat that tiger or wolf instead of its food? It be waiste of engrey it did to kill it and waisting foodDeathly Lamprey Repellent Predation by sea lampreys on native fishes in the Great Lakes is an ongoing problem. To help solve it, Michael Wagner and his team test methods of repelling lampreys. They carried out an experiment to investigate reports that sea lampreys detect the scent of lamprey carcasses and tend to avoid them. The researchers made alcohol-based lamprey carcass extracts, then observed what happened when lampreys were put in tanks and exposed to either this extract or to alcohol alone. FIGURE 25.6 shows their results. FIGURE 25.6 Effectiveness of carcass extracts as a lamprey repellent. Mean proportion of lampreys on the scented side of the test tank during B trials with 10 lampreys. Lampreys were placed in the tank for 20 minutes before exposure to alcohol or carcass extract and remained there for 40 minutes after exposure. The upper graph shows results with alcohol as the stimulus; the lower shows the results with carcass extracts. Bars indicate standard error. Why was it necessary to test the response of lampreys to the scent of alcohol alone?Deathly Lamprey Repellent Predation by sea lampreys on native fishes in the Great Lakes is an ongoing problem. To help solve it, Michael Wagner and his team test methods of repelling lampreys. They carried out an experiment to investigate reports that sea lampreys detect the scent of lamprey carcasses and tend to avoid them. The researchers made alcohol-based lamprey carcass extracts, then observed what happened when lampreys were put in tanks and exposed to either this extract or to alcohol alone. FIGURE 25.6 shows their results. FIGURE 25.6 Effectiveness of carcass extracts as a lamprey repellent. Mean proportion of lampreys on the scented side of the test tank during B trials with 10 lampreys. Lampreys were placed in the tank for 20 minutes before exposure to alcohol or carcass extract and remained there for 40 minutes after exposure. The upper graph shows results with alcohol as the stimulus; the lower shows the results with carcass extracts. Bars indicate standard error. What was the lowest proportion on lampreys on the scented side of the tank when the scent was alcohol? When the scent was alcohol-based carcass extract?
- The type of physical environment in which a species typically lives is its _______. a. niche b. habitat c. community d. populationWhy would you think twice about ordering from a restaurant menu that lists the specific epithet but not the genus name of its offerings? Hint: Look up Homarus americanus, Ursus americanus, Bufo americanus, Lepus americanus, Necator americanus, Lysichiton americanus, Leucoagaricus americanus. and Nicrophorus amcncanus.A gardener releases preying mantises into a garden infested with aphids that eat and destroy her plants which type of interaction is the gardener hoping will benefit the gardn
- Select weather each statement is true or falseWhy would you think twice about ordering from a restaurant menu that lists the specific epithet but not the genus name of its offerings? Hint: Look up Homarus americanus, Ursus americanus, Ceanothus americanus, Bufo americanus, Lepus americanus, and Nicrophorus americanus.Lizards that eat flies they catch on the ground and birds that catch and eat flies in the air are engaged in ______ competition. a. exploitative b. interference c. intraspecific d. interspecific e. both a and d f. both b and c
