Biology: Science For Life With Physiology Plus Mastering Biology With Pearson Etext -- Access Card Package (6th Edition) (what's New In Biology)
6th Edition
ISBN: 9780134794679
Author: BELK
Publisher: PEARSON
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Textbook Question
Chapter 15, Problem 6LTB
All of the following are density-dependent factors that can influence
- weather;
- food supply;
- waste concentration in the environment;
- infectious disease:
- supply of suitable habitat for survival
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Which of the following is a regulator of population size (helps to move it toward its carrying capacity)?
Weather (storms, floods, droughts)
Density dependence
Demographic stochasticity
Which of the following is a density-independent factor limiting population growth in humans?
fatal genetic diseases
temperature
competition for food
fatal contagious diseases
An example of a density-independent limiting factor that influences population growth is ____.
parasites
temperature
disease
competition for food
competition for shelter
Chapter 15 Solutions
Biology: Science For Life With Physiology Plus Mastering Biology With Pearson Etext -- Access Card Package (6th Edition) (what's New In Biology)
Ch. 15 - Prob. 1LTBCh. 15 - Prob. 2LTBCh. 15 - Prob. 3LTBCh. 15 - Prob. 4LTBCh. 15 - According to the graph shown here, the carrying...Ch. 15 - All of the following are density-dependent factors...Ch. 15 - In contrast to nonhuman populations, human...Ch. 15 - Populations that rely on stored resources are...Ch. 15 - The current carrying capacity of Earth for the...Ch. 15 - Prob. 10LTB
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- ______ is a density-independent factor that influences population growth. a. Predation b. Infectious disease c. Resource competition d. Harsh weatherarrow_forwardIn a graph of population size versus time, a J-shaped curve is characteristic of (a) exponential population growth (b) logistic population growth (c) zero population growth (d) replacement-level fertility (e) population growth momentumarrow_forwardIn the logistic model of population growth, per capita growth rates are highest at __ densities and population growth rates are highest at ___ density (NOTE: assume ‘high’ refers to at or near K). A) low, intermediate B) low, low C) low, high D) None of the above are truearrow_forward
- What is the relationship between population density and available resources? exponentially proportional There is no relationship. directly proportional inversely proportionalarrow_forwardA population is expected to grow exponentially after a severe population bottleneck. when the population size is exceeding the carrying capacity of the environment. when the population size is close but below the carrying capacity of the environment. when the birth rate changes as a function of the populationarrow_forwardWhich of the following forces can de-stabilize a population, resulting in a unstable equilibrium? a. short time lags in birth rates or death rates b. inverse density dependence c. density-dependent natality d. moderate competition e. density-dependent mortalityarrow_forward
- When an organisms exhibits ___________ growth its _________ is constant. determinate, fertility determinate, fecundity none of the options are correct indeterminate, fitness indeterminate, fecundity Which of the following does not represent a density-dependent factor of population regulation? competition for resources crowding forest fire disease outbreak none of the options are correctarrow_forwardBriefly explain how each demographic parameter can affect a population. This can be in terms of population structure, growth, decline or survival of the individuals etc.? Dispersion Age structure Fecundity Mortality Sex-ratioarrow_forwardIf population growth is assumed to be density dependent in all four populations, what will happen to these populations sometime after generation 10? 1. Population size will grow monotonically. 2. Rate of population growth will decrease. 3. Rate of population growth will remain the same. 4. All populations will follow the curve of populationarrow_forward
- There are particular factors that quantitatively influence population growth. Choose the correct factor that is being described (mortality, natuality, immagration, emigration) 1. The number of individuals that leave the population; can be due to aniotic factors (e.g., escape from fire, drought, flood, or climate change) or biotic factors (e.g., increased competition). __________________ 2. Number of births; tend to increase with food supply and decrease with competition _____________________ 3. Death; maybe due to kill-off (predation) or die-off (disease, starvation, or exposure) ___________________ 4. The number of individuals entering the population from outside; can be due to abiotic factors (e.g., escape from fire, drought, flood, or climate change) or biotic factors (e.g., increased competition) __________________arrow_forwardThe effective population size is often much smaller than the basic number of individuals in a population. List three main factors that can cause a reduction in the effective population size, and briefly describe each of these factorsarrow_forwardCreate a chart to compare and contrast density-dependent factors and density-independent factors. Include the following: the size of population affected if it is biotic or abiotic a minimum of three examples of each of the factors Density-Dependent Factors Density-Independent Factors Size of Population Affected Biotic or Abiotic? Examplesarrow_forward
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POPULATION REGULATION AND LIMITING FACTORS | DENSITY INDEPENDENT AND DENSITY DEPENDENT FACTORS; Author: BioVidyalaya;https://www.youtube.com/watch?v=mB-AB-5Wnhs;License: Standard YouTube License, CC-BY
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