se cats, and they began 7,000 individual months. These eat rodents and ater supplies. hanges in t, have Which BEST describes why increased rainfall can negatively affect kit fox populations? A Increased rainfall can lead to a loss of suitable kit fox habitats as plant growth decreases. B. Increased rainfall can diminish the local bodies of water, creating drinking water scarcity for kit foxes. D Increased rainfall can cause an increase in plant growth, creating a habitat which makes capturing prey difficult. Increased rainfall can lead to an increase in rodenticide concentrations in agricultural areas where kit fox prey lives.
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- In 1970 the deer population of an island forest reserve about 518 square kilometers in size was about 2000 animals. Although the island had excellent vegetation for feeding, the food supply obviously had limits. Thus the forest management personnel feared that overgrazing might lead to mass starvation. Since the area was too remote for hunters, the wildlife service decided to bring in natural predators to control the deer population. It was hoped that natural predation would keep the deer population from becoming too large and also increase the deer quality (or health), as predators often eliminate the weaker members of the herd. In 1971, ten wolves were flown into the island. The data collected during this program are shown in the following table. The Population Change is the number of deer born minus the number of deer that died during that year. Fill in the last column for each year. The first has been calculated for you. Then graph the deer and wolf populations on the graph below.…In 1970 the deer population of an island forest reserve about 518 square kilometers in size was about 2000 animals. Although the island had excellent vegetation for feeding, the food supply obviously had limits. Thus the forest management personnel feared that overgrazing might lead to mass starvation. Since the area was too remote for hunters, the wildlife service decided to bring in natural predators to control the deer population. It was hoped that natural predation would keep the deer population from becoming too large and also increase the deer quality (or health), as predators often eliminate the weaker members of the herd. In 1971, ten wolves were flown into the island. The data collected during this program are shown in the following table. The Population Change is the number of deer born minus the number of deer that died during that year. Fill in the last column for each year. The first has been calculated for you. Then graph the deer and wolf populations on the graph below.…The Colorado potato beetle has a history of pesticide resistance. The graph shows the number of chemical insecticides used in agriculture that the Colorado beetle population has become resistant to from 1950 to 2010. It took longer for the population of potato beetle to develop a resistance to some insecticides. However, by 1990, the Colorado potato beetle population had developed a resistance to 35 different kinds of insecticides, and farmers ran out of insecticides they could use to control the beetle population. A new type of insecticide was introduced in 1995. 60 40 30 20 10 1960 1970 1980 1990 2000 Year of Report Which of the following best describes what happened from 1965 to 1975 and again from 1995 to 2000 to the insecticide resistance of the beetle population? The Colorado beetle gene pool for insecticide resistance was identical and the insecticide had no effect on the beetle population, which is why it continued to increase. The introduced insecticides were effective for a…
- BisonBison roamed free in an area along the eastern slopes of the Rockies, in what is now Banff National Park, for thousands of years before being wiped out by hunting in the mid-1800s. Elk Island National Park, located 35 km east of Edmonton has been an important refuge for bison, amongst many other species of animals.In January 2017, 16 bison, which were raised in Elk Island National Park, were moved to Banff National Park. They were contained in a paddock initially, but then the animals were released into a partially fenced area, about 425 km2 in size, in the backcountry. There is hope the animals will eventually be free roaming. A) Suggest two reasons why the population of bison in Banff National Park might NOT be in Hardy–Weinberg equilibrium. B)There are six species of animals in an area at the end of Thunder Bay. The area is wooded land covering rolling hills with two small rivers. Most of the area is surrounded by farm land where people have sheep and cows. There are three roads in the area, one of which leads to an expanding subdivision. a) Chose the species you believe to be most likely to become endangered and the species you believe to be least likely to become endangered. Compare and contrast these two species to explain your decision b) Which two species do you think would be most likely to exhibit a competitive relationship? c) Explain two density-dependent factors that may affect population P in this area d) Explain two density-independent factors that may affect population P in this areaUpland game hunters in Illinois have been noticing a decrease in therabbit and pheasant populations over the past five years. They havelobbied the Department of Natural Resources and the statelegislature to allow them to shoot red-tailed hawks, one of therabbit’s and pheasant’s main predators. Explain why shooting hawkswill not ultimately solve the problem of a decreased rabbit andpheasant population
- You are part of a restoration ecology program that is attempting to reintroduce an endangeredbird to a new habitat in Michigan, where they have been locally extinct for decades. The species went through an extreme bottleneck after they were almost wiped-out due to insecticide use in the 1960s. Maintaining what limited genetic diversity remains is an important priority, especially because disease spread from other bird speciesrepresents a major threat to the struggling populations of these birds. Captive-bred warblersdestined for this site have been genotyped at a neutral marker locus “D” with two alleles, D95and D135. The genotype counts in the captive animals are as follows:D135/D135 = 12, D135/D95 = 20, and D95/D95 = 48 2a. If all the species are used to start the new population, what is the probability that thepopulation eventually becomes fixed for allele D95 through drift?2b. Let’s assume the population stays the same size (as the number of introduced individuals) inthe new…Which nonnative species threatens the habitat in Olympic National Park? Wild boars O Mountain goats Gray wolves Hoary marmots O Mule deerThis beetle species has two colors, brown and green. These beetles are normally found in muddy fields where there are patches of green grass as well as patches of brown dirt. Both the green and brown beetles have places in these fields where they are camouflaged from predators. But there is a very dry summer and all of the green grasses turn brown. Now, the fields where the beetles live are all brown. The green beetles are now much easier for the predators to see. Over many months, predict how this population of beetles might evolve through natural selection. Make sure to include all of the principles of natural selection (VCAR). Principles: Variation: slight differences amongst individuals in the population Competition: for an environment's resources Adaptation: the advantage some members of the population have over others in the population Reproduce: organisms that survive will increase in number
- The remote Galápagos islands are famous for their unusual wildlife (Figure 5). In 1900, the Galápagos had 112 invasive species. By 2007, that number had risen to 1321. Why do you think island wildlife might be more threatened by invasive species?A small number of lizards are introduced to an island. Their native habitat is a forest and they mostly live in trees. The island has few trees and the lizards spend most of their time on the ground where they are eaten by snakes. Over many generations the island population of lizards develop shorter toes and longer legs which allow them to run faster on bare ground. The lizards withe longest legs/shortest toes are the least likely to be caught be snakes. After several decades lizards are collected from the island and placed in enclosures. Lizards from the original forest habitat are placed in identical enclosures. Each type of lizard mates and has offspring. The offspring resemble their parents and the offspring of island lizards have shorter toes/longer legs than offspring of forest lizards (i.e the differences you see in nature are also found in a lab setting). This is an example of Group of answer choices a. both natural selection and evolution b. evolution only c.…Match the invasive species with the appropriate descriptor Since its introduction into Guam, has decimated the local bird population [ Choose ] Kudzu Vine Asian Long Horned Beetle European Rabbit Fossa Monarch Butterfly Asian Carp Dutch Elm Disease Black Rat Burmese Python Asian Tiger Mosquito Fruit Bat Cane Toad Brown Tree Snake Lionfish Estimated to have killed nearly 75% of the species of trees it infected after it was introduced into North America [ Choose ] Kudzu Vine Asian Long Horned Beetle European Rabbit Fossa Monarch Butterfly Asian Carp Dutch Elm Disease Black Rat Burmese Python Asian Tiger Mosquito Fruit Bat…