A particular species of snake was accidentally introduced into a region where it had no natural enemies. These introduced snakes fed on birds and insects that were the food of native snake species. Over the next few years, the introduced snake population grew rapidly in size. How will the introduced snakes most likely impact the native snake population? The native snake population will decrease as competition for food increases. Native snakes will adapt to eating different varieties of food. The native snake population will increase as it migrates to new areas. Native snakes will mate with the invaders to form a new species.

A particular species of snake was accidentally introduced into a region where it had no natural enemies. These introduced snakes fed on birds and insects that were the food of native snake species. Over the next few years, the introduced snake population grew rapidly in size. How will the introduced snakes most likely impact the native snake population? The native snake population will decrease as competition for food increases. Native snakes will adapt to eating different varieties of food. The native snake population will increase as it migrates to new areas. Native snakes will mate with the invaders to form a new species.

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.
Which of the following is not a way that humans have increased the carrying capacity of the environment? a. agriculture b. using large amounts of natural resources c. domestication of animals d. use of language
A researcher wanted to know if introduced predators (lake trout, a fish) caused a decrease in the abundance of yellow-legged frogs. The ecologist measured the density of frogs (number frogs per meter of shoreline of a lake) in lakes that did not have any introduced predators (fish absent), lakes that had previously introduced predators (fish present), and lakes from which he removed the predators (fish removed), and then recorded if frog density increased, decreased, or stayed the same over one year. part a: What was the role in the experiment of the “fish present” lakes? Group of answer choices A. subjects B. experimental group C. positive control group D. negative control group E. standardized condition part b: This study focused primarily on ______________ ecology. Group of answer choices A. organismal B. population C. community D. physiological E. biosphere
An ecologist studied how many kangaroo rats could be supported in two different habitats, a high‐quality habitat and a low‐quality habitat. The ecologist estimated the per capita benefit in each habitat as the number of individuals increased.
Which one of the following is not a food chain? Squirrel ➞ nuts ➞ hawk Leaves ➞ caterpillar ➞ bird Grass ➞ cows ➞ humans Grass ➞ antelope ➞ tiger
In a certain ecosystem, field mice are preyed on by snakes and hawks. The entry of wild dogs into the system adds another predator of the mice. Of the following, the most likely short-term result of this addition is Group of answer choices: extinction of the hawks. a tendency for hawks to prey on the dogs. a reduction in numbers of mice. migration of the hawks to another ecosystem. an increase in snake population.
Imagine you were the manager of a national park with cheetahs. The cheetahs feed primarily on gazelles, while the gazelles eat grass. It takes an acre of grassland to feed one gazelle, and it takes ten gazelles to feed one cheetah. You have a maximum of ten cheetahs when the system is functioning optimally. You would like to increase the cheetah population because people pay money to see the cheetahs. How much grassland do you need to double the cheetah population supported by this grassland? Select one: A. 500 acres B. 100 acres C. 400 acres D. 200 acres E. 10 acres
Which of the following is a factor that would decrease the size of a population? A. Death rate is higher than the birth rate B. Abundant food supply C. Immigration D. Birth rate is higher than the death rate
The world population reached seven billion in 2011. At current growth rate, it is expected to reach eight billion by 2024 and nine billion by 2037. However, many projections predict that the world population will level off at around 9 billion individuals. Why is the world population expected to level off?
Approximately 14,000 years ago, the climate in North America began to warm rapidly. At the same time, human hunters migrated to the continent. Which of these most likely resulted from a combination of these two factors? an increase in the rate of large mammal extinctions a reduction in the rate of species change an increase in the amount of interspecies cooperation a reduction in the total number of small parasitic insects
An ecologist studied how many kangaroo rats could be supported in two different habitats, a high‐quality habitat and a low‐quality habitat. The ecologist estimated the per capita benefit in each habitat, or patch, as the number of individuals increased. How many individuals must move to the high‐quality patch before an individual moves to the low‑quality patch? Find Number of individuals? Number of individuals High-quality patch per capita benefit Low-quality patch per capita benefit 1 10.0 5.0 2 7.9 4.3 3 6.5 3.7 4 5.4 3.2 5 4.5 2.9 6 3.9 2.6 7 3.4 2.4 8 3.0 2.2 9 2.7 2.0 10 2.4 1.9
2 Wolves are introduced into the park → The number of elk calves born to every 100 female elk Stayed the same Decreased Increased → The overall elk population Stayed the same Decreased Increased → Competition for plants elk eat Stayed the same Decreased Increased → Availability of resources for bison Stayed the same Decreased Increased → Bison population