Concept explainers
Videos
The orderly progress of communities, starting from bare rock with no soil traces of a previous community, is called
a. primary succession.
b. secondary succession.
c. subclimax community.
d. climax community.
Introduction:
Environmental resistance plays an important part in stopping the exponential growth in a population. It occurs through both density-dependent and density-independent mechanisms. As the name suggests, the density-independent mechanisms of limiting population do not depend on density related factors, for example, climate. Density-dependent factors, on the other hand, are dependent on density and include factors like prey-consumers interactions.
Answer to Problem 1MC
Correct answer:
Floods are a density-independent environmental resistance.
Explanation of Solution
Explanation for the correct answer:
Option (b) is given that the floods. This is correct as flood which can be classified as a weather or climatic condition occurs independent of the density of the population but can have a drastic effect on the population. Density-independent factors involve weather and climate. These factors exert influence on the size of the population irrespective of the density of the population. Hence, option (b) is correct.
Explanation for incorrect answers:
Option (a) is given that predation is a density-independent environmental resistance. This is incorrect as predation is a density-dependent environmental condition causes an increase in density makes predation easier. So, it is an incorrect option.
Option (c) is given that the parasitism is a density-independent environmental resistance. This is incorrect as parasitism is a density-dependent environmental condition. Increase in density is correlated to increase in parasitism. So, it is an incorrect option.
Option (d) is given that competition is a density-independent environmental resistance. This is incorrect as competition is a density-dependent environmental condition. Increase in density leads to an increase in competition. So, it is an incorrect option.
Hence, options, (a), (c), and (d) are incorrect.
Thus, it can be concluded that floods can be classified as a density-independent environmental resistance.
Want to see more full solutions like this?
Chapter 28 Solutions
Biology: Life on Earth (11th Edition)
- Species that are the first colonists in a habitat undergoing primary succession a. are usually the fiercest competitors. b. help maintain their habitat constant so their persistence is ensured. c. may change their habitat in a way that favors the invasion of other species. d. must first be successful secondary succession specialists.arrow_forwardAfter an extensive forest fire, an affected region of the forest shows signs of ecological succession. Place the steps of succession in the correct order.arrow_forwardA rancher grazes cattle in a forest reserve. The cattle selectively graze grasses, herbs, and small shrubs. After 10 years, the cattle are removed from the forest and the forest begins to change back the way it was before the cattle were introduced. The changes in the forest would be an example of a. a climax community b. a pioneer community c. primary succession d. secondary successionarrow_forward
- Lightning strikes in interior Alaska have resulted in frequent wildfires due to dry climate in late spring. What type of species is expected to grow in the area affected by the wildfire and what type of succession will it be, respectively? Select one: a. First Species to Grow Type of Succession Lichen Secondary b. First Species to Grow Type of Succession Tundra grass Primary c. First Species to Grow Type of Succession Tundra grass Secondary d. First Species to Grow Type of Succession Lichen Primary How are two different populations able to occupy the same ecological niche without one population eliminating the other? Select one: a. through low intraspecific competition for food and breeding areas b. through low interspecific competition for food and breeding areas c. through high intraspecific competition for food and breeding areas d. through high interspecific competition for food and breeding areasarrow_forwardAfter an extensive forest fire, an affected region of the forest shows signs of ecological succession. Place the steps of succession in the correct order.arrow_forwardSecondary succession occurs more quickly than primary succession mainly because O a. disturbances in the community exposes more soil b. sunlight is more available C. improved soil is present from the start d. nitrogen-fixing bacteria are present e. rocky areas contain more mineralsarrow_forward
- Which of the following locations would NOT represent a site for primary succession? A. A forest that was recently destroyed by a fire. B. A volcanic island. C. A retreating glacier. D. All of the above represent sites of primary succession.arrow_forwardPrimary succession is a gradual change in community structure that begins with a ___i___ community and leads towards a ___ii___ community. The statement given above is completed by the information in row ______. Row i ii A pioneer climax B seral pioneer C pioneer seral D seral climaxarrow_forwardThe figure shows examples of possible disturbance intensity (y-axis) and frequency (x-axis) combinations. The type of succession occurring after disturbance A is the type of succession occurring after disturbance C is and High A B C D Low Low High Frequency A. primary; climax B. primary; secondary C. primary; little succession occurs D. secondary; primary E. secondary; climax Intensityarrow_forward
- A forest fire destroys a large section of a mature forest. Several years later, the area is covered with a mix of grasses, shrubs, and small trees. The process of ecological recovery in this forest is characterized by the re-establishment of complex plant communities. 1) Is this an example of primary or secondary succession? 2) Which stage of ecological succession is most likely represented by this scenario? Intermediate stage Alternative stable stage Pioneer stage Climax Community Stagearrow_forwardWhat type of ecological succession occurs on bare ground without soil? A. Secondary succession B. Primary succession C. Tertiary successionarrow_forwardOf the following, which could be an anthropogenic factor that would influence ecological succession? A. volcanic eruption B. wind storms C. agriculturearrow_forward
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education