Mclver beetles come in three colors: black, white, and brown. They are consumed by the Foust finch. To avoid predators, the beetles hide on the bark of trees in their environments. If the number of trees with black bark was significantly greater than the number of trees with white or brown bark, what would be the effect on the predation of Mclver beetles by the Foust finches? Far fewer black beetles would I + Which of the five conditions of Hardy-Weinberg equilibrium would be violated in this situation? V [ Select ] Genes are now mutating. Mating is no longer random. The population size is now much larger. The population would experience natural selection pressures. There is now immigration of individuals into the population.

Mclver beetles come in three colors: black, white, and brown. They are consumed by the Foust finch. To avoid predators, the beetles hide on the bark of trees in their environments. If the number of trees with black bark was significantly greater than the number of trees with white or brown bark, what would be the effect on the predation of Mclver beetles by the Foust finches? Far fewer black beetles would I + Which of the five conditions of Hardy-Weinberg equilibrium would be violated in this situation? V [ Select ] Genes are now mutating. Mating is no longer random. The population size is now much larger. The population would experience natural selection pressures. There is now immigration of individuals into the population.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter19: Population And Community Ecology

Section: Chapter Questions

Problem 2ACQ: Figure 19.6 If the major food source of seals declines due to pollution or overfishing, which of the...

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Figure 19.6 If the major food source of seals declines due to pollution or overfishing, which of the following would likely occur? a. The carrying capacity of seals would decrease, as would the seal population. b. The carrying capacity of seals would decrease, but the seal population would remain the same. c. The number of seal deaths would increase, but the number of births would also increase, so the population size would remain the same. d. The carrying capacity of seals would remain the same, but the population of seals would decrease.
Bluebirds are songbirds that, like wood ducks, nest in cavities in trees. European house sparrows, which have been introduced to North America, also nest in such cavities. Explain how the arrival of the house sparrows affected the carrying capacity for bluebirds. What affect would you expect this change have on the number of bluebirds?
The Barton Springs salamander is an endangered species found only inthree adjacent springs in the city of Austin, Texas. There is growingconcern that a chemical spill on a nearby freeway could pollute thespring and wipe out the species. To provide a source of salamanders torepopulate the spring in the event of such a catastrophe, a proposal hasbeen made to establish a captive breeding population of the salamanderin a local zoo. You are asked to provide a plan for the establishment ofthis captive breeding population, with the goal of maintaining as muchof the genetic variation of the species as possible. What factors mightcause loss of genetic variation in the establishment of the captivepopulation? How could loss of such variation be prevented? With theassumption that only a limited number of salamanders can bemaintained in captivity, what procedures should be instituted to ensurethe long-term maintenance of as much variation as possible?
A southern European songbird, the blue tit, breeds in two habitats that differ greatly in quality.In deciduous oak forests, blue tits produce so many young that their populations have thepotential of growing at the astronomical rate of 10% annually. In evergreen oak habitats, blue titsperform poorly, with populations showing a potential for a rapid decline of 13% annually. Yetblue tits persist in both habitats. Why?
Mimicry of yellowjacket wasps by clearwing moths is an example of a harmless species resembling a dangerous one. What is the ad-vantage to the moth of this form of mimicry? What is the advan-tage to a dangerous species of mimicking another dangerous species?
The long-leaf pine forest ecosystem once extended across 95 million acres of the southeastern US. However only 5 million acres now remain causing major declines in the Gopher tortoise population. Given this, what is expected to happen to overall diversity of species that depend on Gopher Tortoise burrows?a. increaseb. decreasec. stay the same
What would it mean if apredator removal experiment yielded theopposite results from those shown in Figure 54.5—that is, numbersof surviving moths increased where predators were not removed?
Whichof the following factors can stabilize predator-prey relationships by providinga prey refuge?a.An area of prey habitat where predators cannot enterb.An area of prey habitat that is isolated and difficult for predators tofindc.The occurrence of prey in numbers too large for predators to attackeffectivelyd.The ability of prey to grow to a size invulnerable to predatione.All of the choices apply.
The Atlantic cod population is of primary economic importance to fishingcommunities throughout the maritime provinces in Canada. Unfortunately, thispopulation has underwent an extreme collapse in recent years due to overfishing.Some argue, however, that the collapse of the cod population may actually beattributed to an increase in the population of harp seals, a known predator ofcod. One suggestion to help cod stocks recover is therefore to permit the huntingof harp seals on a large scale. Suggest and explain one potentially negativeconsequence of limiting the harp seal population.
What are three aspects of your lifestyle that mightdirectly or indirectly contribute to decline in European honeybee populations and the endangerment ofother pollinator species?
For the cricket, the intrinsic growth rate is 100 and the carrying capacity of the environment is 200,000 individuals. For the frog, the capture efficiency is 0.0002, the conversion efficiency is 0.1, the handling time per cricket is 0.2 hours, and the density-independent per capita death rate of the predator is 0.4. 18. At what value of the number of crickets is the predator population of frogs at equilibrium? 19. What is the dN/dt of the prey population when the number of frogs is 60 and the number of crickets is 11,000? Round to the nearest hundredth. 20. What is the dP/dt of the predator population when the number of frogs is 60 and the number of crickets is 11,000? Round to the nearest hundredth.
In a population of sociable weavers (small birds that live in the African savanna), body weight was recorded for 977 birds and graphed. (n) Identify and describe the type of selection that is occurring in the population of sociable weavers. (o) A group of fire ants from North America were accidently brought to African savanna by an American tourist in their luggage. The fire ants bite and cause harm to all organisms and their food supply in the savanna. Explain how the fire ants will impact the ecosystem dynamics