EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Chapter 40, Problem 9TYU
FOCUS ON INTERACTIONS In a short essay (100-150 words), identify the factor or factors in Figure 40.23 that you think may ultimately be most important for density-dependent population regulation in humans, and explain your reasoning.
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HA
Which set of values for the intrinsic rate of increase, finite rate of increase, and net
reproductive rate could describe the same growing population?
(Note: you should not need to do any math to figure this one out. Just think through general
interpretations of each parameter)
Or = -0.14, A = 0.87, RO = 0.5
r = 3.0, A = 0.22, RO = 0.5
r = 0.22, A = 1.25, RO = 3.0
%3!
r =
= 0.22, A = -0.14, RO = 0.5
Why D is wrong?
Chapter 40 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 40.1 - Explain how the suns unequal heating of Earths...Ch. 40.1 - WHAT IF? If global warming increases average...Ch. 40.2 - Why are phytoplankton and not benthic algae or...Ch. 40.2 - Prob. 2CCCh. 40.2 - WHAT IF? Water leaving a reservoir behind the dam...Ch. 40.3 - Give examples of human actions that could expand a...Ch. 40.3 - WHAT IF? You suspect that deer are restricting the...Ch. 40.4 - DRAW IT Each female of a particular fish species...Ch. 40.4 - Imagine that you are constructing a life table for...Ch. 40.4 - Prob. 3CC
Ch. 40.5 - Explain why a constant rate of increase (r) for a...Ch. 40.5 - Explain why a population that fits the logistic...Ch. 40.5 - Prob. 3CCCh. 40.6 - Prob. 1CCCh. 40.6 - WHAT IF? Mice that experience stress such as a...Ch. 40.6 - Prob. 3CCCh. 40 - Which of the following biomes is correctly paired...Ch. 40 - A populations carrying capacity A. may change as...Ch. 40 - When climbing a mountain, we can observe...Ch. 40 - According to the logistic growth equation...Ch. 40 - WHAT IF? If the direction of Earths rotation...Ch. 40 - INTERPRET THE DATA After examining Figure 40.13,...Ch. 40 - SCIENTIFIC INQUIRY Jens Clausen and colleagues, at...Ch. 40 - Prob. 8TYUCh. 40 - FOCUS ON INTERACTIONS In a short essay (100-150...Ch. 40 - SYNTHESIZE YOUR KNOWLEDGE Locusts (a type of...
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- Explain the differences between equations for exponential population growth, logistic population growth, and Lotka-Volterra models for competition. Illustrate how and explain why these equations yield different trends?arrow_forwardPlease solvearrow_forwardGive other specific examples of organisms exhibiting optimization of the feeding process except or aside from ants.arrow_forward
- Give typing answer with explanation and conclusionarrow_forwardCalculate the rate of population change for a hypothetical population of wildebeest using the logistics equation and carrying capacity equation. How can you explain these results? N = 500, r = 0.1, K = 1000, calculate dN/dt.arrow_forwardThe relationship between predator and prey populations has been studied by computer simulation using equations which form part of a mathematical model devised by Lotka and Volterra. The data in Table 6.10 show the results of such a simulation when the prey population begins with 20 individuals and the predator population begins with six individuals. 1.Explain why the peaks in the predator population occur after those in the prey population. 2. This simulation assumes one prey species and one predator species in an imaginary ecosystem and is based on mathematical equations. Why is it likely to be too simplistic to describe accurately what happens in nature?arrow_forward
- 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.arrow_forwardratio of birth of horse is 50:50 please answer all the parts as they are connected a) what you can know from the graph? why these curve of male and female is different. please propose some kind of testable hypothesis related to horse life. b) in case population growth is exponential and its dangerous for the surrounding. management team is called in the zoo from the graph which horse should be pick for maximum effect in lowering the growth?arrow_forward#1 onlyarrow_forward
- Think about a predator-prey system that perfectly follows Lotka-Volterra dynamics. The search efficiency parameter (a) represents how quickly the predator finds and kills its prey. What would happen if most the predator population had a parasite that made them less effective predators? Infected animals find and kill prey less frequently (that is, the parasite caused the value of the search efficiency parameter to decline). the populations would still cycle; the amplitude of prey and predator would increase Othe populations would no longer cycle; the prey would increase and the predator would go extinct the populations would no longer cycle; the prey would go extinct and the predator would increase the populations would still cycle; the amplitude of prey and predator would decline the predator and prey populations would no longer cycle; the parasite and the predator populations would cycle insteadarrow_forwardIn a mark–recapture study to estimate the size of a rodent population, researchers catch and mark 180 individuals. Two days later, they again trapped and 40% of the 100 individuals captured carried a mark from 2 days earlier. Assuming all assumptions of the mark-and-recapture methods have been met, the estimated size of the population is Group of answer choices 720 450 360 600arrow_forwardYou are studying a density - dependent turtle population that has the following relationships for the birth rate b’ and the death rate d’ as a function of population size (N) : b’ = 0.10 + 0.03 N - 0.0005 N ^2 d’ = 0.20 + 0.01 N Plot these functions in the same graph and discuss the population dynamics of the turtle. How does this model differ from the simple logistic model with linear birth and death functions?arrow_forward
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