Biology Lecture 13 Study Guide

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

According to the phase plane diagram, what is the approximate value of the carrying capacity (K) for species 1?

  • $K_1 = 25$
  • $K_1 = 50$ (correct)
  • $K_1 = 60$
  • $K_1 = 43$

Based on the information provided, which statement best describes the coexistence of the two species?

  • The species can coexist, but one species will eventually outcompete the other.
  • The species cannot coexist because their isoclines do not intersect.
  • The species cannot coexist because their carrying capacities are different.
  • The species can coexist, and their populations will stabilize at the point where the isoclines intersect. (correct)

What is the approximate value of the population size for species 2 at the point where the isoclines intersect?

  • $N_2 \approx 60$
  • $N_2 \approx 50$
  • $N_2 \approx 25$
  • $N_2 \approx 43$ (correct)

Which of the following statements best describes the trajectory of the population dynamics shown in the time series plot?

<p>Species 1's population initially increases, while species 2's population initially decreases, then they stabilize at the point where their isoclines intersect. (D)</p> Signup and view all the answers

Which of the following statements is true about the stability of the ecosystem represented by the phase plane diagram?

<p>The ecosystem is stable because the isoclines intersect, and the populations will stabilize at that point. (B)</p> Signup and view all the answers

Based on the phase plane diagram, which of the following statements is true about the competitive relationship between the two species?

<p>The species exhibit competition, but their populations can stabilize at the intersection of their isoclines. (A)</p> Signup and view all the answers

In a competitive scenario between two species, what does it mean when the isoclines intersect at a point on the phase plane?

<p>It indicates an unstable coexistence where both species cannot coexist unless their abundances are precisely at the intersection point. (C)</p> Signup and view all the answers

According to the Lotka-Volterra competition equations, which of the following outcomes is NOT possible for two competing species?

<p>Both species coexist indefinitely, but their abundances oscillate periodically. (B)</p> Signup and view all the answers

If the isocline for species A is a horizontal line on the phase plane, what does this imply about the growth rate of species A?

<p>The growth rate of species A is independent of the abundance of species B. (A)</p> Signup and view all the answers

In a competitive scenario where the isoclines do not intersect on the phase plane, what can be concluded about the outcome?

<p>One species will eventually outcompete and eliminate the other, regardless of their initial abundances. (B)</p> Signup and view all the answers

What is the significance of the slope of an isocline on the phase plane?

<p>It determines the stability of the coexistence point, if one exists. (B)</p> Signup and view all the answers

In a competitive scenario with two species, what does it mean if the isoclines are parallel and do not intersect?

<p>One species will eventually outcompete and eliminate the other, regardless of their initial abundances. (B)</p> Signup and view all the answers

According to the information provided, what condition must be met for stable coexistence of two competing species?

<p>Intraspecific competition must be greater than interspecific competition for both species. (C)</p> Signup and view all the answers

Which of the following statements best describes the criterion for coexistence of competitors, as shown in the equations?

<p>$K_1/\alpha_{12} &gt; K_2$ and $K_2/\alpha_{21} &lt; K_1$ (D)</p> Signup and view all the answers

In the phase plane diagram, what do the regions with K's on the inside and outside represent?

<p>K's on the inside represent stable coexistence, and K's on the outside represent unstable coexistence. (B)</p> Signup and view all the answers

Based on the phase plane diagram and the trajectory shown, what can be inferred about the coexistence of the two species?

<p>The species can coexist because the trajectory crosses the isoclines in the stable region. (A)</p> Signup and view all the answers

In the phase plane diagram, what do the isoclines represent?

<p>The isoclines represent the points where the population growth of both species is zero. (B)</p> Signup and view all the answers

According to the information provided, what condition must be met for similar species to coexist?

<p>Intraspecific competition must be greater than interspecific competition. (C)</p> Signup and view all the answers

Flashcards are hidden until you start studying

More Like This

Use Quizgecko on...
Browser
Browser