Ecology Quiz: Population Reguation And Density Dependent Factors!

16 Questions | By Biology16100 | Updated: Mar 22, 2022 | Attempts: 1470

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Ecology Quiz: Population Reguation And Density Dependent Factors! - Quiz

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1.

Compare and contrast r-selected and K-selected organisms. Give one example of each.
2.

Define the terms primary and secondary ecological succession.
3.

Life history traits reflect evolutionary adaptations of reproduction strategies and age-specific distribution of reproduction and mortality. For each of these adaptations describe 2 examples.
4.

An example of a density-dependent factor that influences the size of a population is:
- A.
  
  Competition
- B.
  
  Predation
- C.
  
  A fire
- D.
  
  Two of the responses are correct
- E.
  
  All of the responses are correct
5.

A typical r-selected organism might be a(n) ; a K-selected organism might be a(n) .
- A.
  
  Mouse, elephant
- B.
  
  Elephant, mouse
- C.
  
  Mouse, rabbit
- D.
  
  Rabbit, fly
- E.
  
  Rabbit, mouse
6.

Generally r-selected organisms exhibit:
- A.
  
  Short life spans and little parental care of offspring
- B.
  
  Long life spans extended parental care of offspring
- C.
  
  Long development time to maturity, but small body size
- D.
  
  Large body size and extended parental care of offspring
- E.
  
  Large body size, but short life spans
7.

Species that show a type I survivorship curve would be expected to:
- A.
  
  Be K-selected
- B.
  
  Have high mortality early in life
- C.
  
  Have constant mortality throughout life
- D.
  
  Have high mortality late in life
- E.
  
  Two responses are correct
8.

Organisms such as oysters or fish that produce millions of eggs per year may be characterized as:
- A.
  
  R-selected and having a type I survivor-ship curve
- B.
  
  K-selected and having a type I survivor-ship curve
- C.
  
  R-selected and having a type II survivor-ship curve
- D.
  
  K-selected and having a type II survivor-ship curve
- E.
  
  R-selected and having a type III survivor-ship curve
9.

In a population characterized by type III survivor-ship, the probability of survival with age.
- A.
  
  Increases
- B.
  
  Decreases
- C.
  
  Does not change
- D.
  
  Is variable
- E.
  
  None of the responses are correct
10.

Pest or weedy species are typically and exhibit survivor-ship curves
- A.
  
  R-selected, I
- B.
  
  R-selected, II
- C.
  
  R-selected, III
- D.
  
  K-selected, I
- E.
  
  K-selected, III
11.

Natural selection involves energetic trade-offs between or among life history traits such as:
- A.
  
  Number of offspring per reproductive episode
- B.
  
  Number of reproductive episodes per lifetime
- C.
  
  Age at first reproduction
- D.
  
  Only A and C are correct
- E.
  
  A, B and C are correct
12.

Which of the following is a density-independent factor limiting human population growth?
- A.
  
  Social pressure for birth control
- B.
  
  Earthquakes
- C.
  
  Plagues
- D.
  
  Famines
13.

Which survivor-ship curve is typical of organisms like deciduous trees that experience a high early mortality and, once established, manage to live a long time?
- A.
  
  Type I
- B.
  
  Type II
- C.
  
  Type III
- D.
  
  None of these are correct
14.

The type I survivor-ship curve is typical for modern humans living in industrialized societies. What type of survivor-ship curve is characteristic of humans long ago, or that probably occurs in impoverished underdeveloped countries?
- A.
  
  Type I
- B.
  
  Type II
- C.
  
  Type III
- D.
  
  None of these are correct
15.

Carrying capacity can not be dynamic
- A.
  
  True
- B.
  
  False
16.

Which of the following can contribute to density-dependent regulation of populations?
- A.
  
  The accumulation of toxic wastes
- B.
  
  Intraspecific competition for nutrients
- C.
  
  Predation
- D.
  
  All of the above
- E.
  
  None of the above