Concept explainers
Fill-in-the-Blank
Two examples of density-independent forms of environmental resistance are________ and __________. Two important types of density- dependent environmental resistance are__________ and__________. LO4
To review:
The given blank space in the statement, “Two example of density-independent forms of environmental resistance are ________ and _______. Two important types of density-dependent environmental resistance are _____ and __________.”
Introduction:
Environmental resistance acts as a means to regulate the population size in any given area, below or equal to the carrying capacity. There are mainly two types of environmental resistances, namely density-dependent and density-independent.
Explanation of Solution
Density-dependent resistance depends on the population density of any area. They mainly include factors such as any essential requirements, lack of which could lead to a decline in population, for example, food, nutrients, and space. Certain interactions such as predation and competition also arise due to rise in population and thus form a part of the density-dependent resistance.
Density-independent resistance acts independently from population density. They mainly include natural disasters and extreme climatic changes, which lead to drastic effects on population size. For example, flood, fire, storm, drought, habitat destruction, and freezing.
The given blank space in the statement, “Two example of density-independent forms of environmental resistance are fire and drought. Two important types of density-dependent environmental resistance are nutrient and space.”
Want to see more full solutions like this?
Chapter 26 Solutions
Biology: Life on Earth
- Read each situation in the chart below. Then, state if it is a density-independent limiting factor or a density-dependent limiting factor. Then, state the specific limiting factor that is occurring. The first one is done for you as an example. SITUATION Dependent - Independent or Density-Dependent Limiting Factor Mrs. Engelbrecht has 32 students assigned to her Biology Class, but she only has room for 28. Because the room is crowded, the extra 4 students leave room to go to Guidance and have their schedules changed. Density- Dependent Emigration Northern pike (it’s a fish) feed on another fish, the yellow perch. An increase in the yellow perch population causes an increase in the northern pike population. Density- Dependent The BP oil spill in the Gulf of Mexico has harmed many aquatic organisms that live in the Gulf region. Density- Independent A new strain of influenza (the flu) breaks out in New York City Density- Dependent A…arrow_forwardPest and diseases are the main cause for decreased crop yield; can you elaborate some important measures to control these organisms? Support your answer by considering all the possibilities of pest prevalence and their control please please answer thatarrow_forward===================================Which of the following sentences is not true: a.Incidence rates describe the occurrence of new cases of a disease or condition in a community over a period of time relative to the size of the population at risk at the same time period. b.Mortality rates, or rates of illness, in public health are incidence and prevalence rates. c.A prevalence rate is the number of all cases of a specific disease or condition in a population at a given point in time relative to the population at the same point in time. Yazed sent Today at 3:04 AMOne factor causing another particular event are more complex than what exist in the epidemiological triangle as Causal relations. a.True. b.False. ======================= (Case finding, Screening, Health education); all of these are ways of Secondary prevention for COVID-19. a.True. b.False.arrow_forward
- Explains, with several scientifically detailed information, how global warming affects the beélugas population. (With an explanation of more than 700 words)arrow_forwardWhich of the following does NOT describe an externality? A: A flower farm is located in a semi-urban part of town. The flowers attract pollinators that help nearby farms but also provoke allergies for some of the local residents. B: A cranberry farm releases acidic water into a nearby river that is an important habitat for many native species. C: A firm voluntarily adopts a new technology that reduces how much pollution it emits into the air, resulting in cleaner air for everyone. D: An industrial-scale farm uses high amounts of pesticides which reduces the farm’s ability to produce food over the longer term.arrow_forwardOne of the R's of pesticide problems which entails the possible increase in pest population once the pesticide effects are gone *arrow_forward
- The rate of plant growth on an island near Isle Royale is such that the carrying capacity of moose on the island is 450. Currently there are 450 moose present. The environment is stable and free of wolves. One day, 200 additional moose arrive on the island. What is the expected number of moose on the island 30 years later, assuming conditions do not change?arrow_forwardBased on the text on mosquitoes eating: 1. Identify abiotic factors that support the survival and reproduction of the mosquitoes and why the pest needs this factors. 2. Identify biotic factors that support the survival and reproduction of the mosquitoes and why the pest needs this factors. 3.Predict what factors in the environment can be altered to decrease the survival and reproduction of the pest and why they can decrease the survival and reproduction of the pest. PLEASE ANSWER ALL QUESTIONS BASED ON THE TEXT.arrow_forwardFind examples of: One density-independent factor that can influence an organism's intrinsic growth rate. One density-dependent factor based on population regulation and one factor based on the Allee effect that can influence an organism's intrinsic growth rate.arrow_forward
- “Arbor Day” and “Earth Day” influence the passing of the “________Species Act”.arrow_forwardSo far we have discussed changing environments affecting your species at risk. Changing environments can also have impacts on human health. Choose one environmental or societal change that has impacted human health. Explain the impacts and discuss any technological advances that can lessen the impact. I need the answer with references pleasearrow_forwardDefine the following and give examples of each:Density independent limiting factor - Density dependent limiting factor -arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & 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 & CompanyLaboratory 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