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ECO 6-5 ODD 4th

Short Answer
 

 1. 

What does r represent?
 

 2. 

________ the combination of all factors that act to limit the growth of a population.
 

 3. 

What is typical of an r-selected species? Provide two characteristics.
 

 4. 

List 4 limiting factors on the growth of populations.
 

 5. 

What does K represent?
 

 6. 

What are four variables that determine population sizes?
 

 7. 

The locations and sizes of populations vary with what?
 

 8. 

List 4 reasons why populations clump?
 

 9. 

What are the three general patterns of population distribution or dispersion in a habitat?
 

 10. 

What are the three age structure categories for an age structure diagram?
 

 11. 

What is typical of an K-selected species? Provide two characteristics.
 

 12. 

No population can grow indefinitely because of limitations on _______ and _________ between species for those resources.
 

 13. 

What does N represent?
 

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 14. 

A logistic growth curve depicting a population that is limited by a definite carrying capacity is shaped like the letter ____.
a.
L
b.
J
c.
U
d.
S
e.
M
 

 15. 

Which of the following is typically characteristic of a K-strategist species?
a.
low survival rate of offspring
b.
tend to produce high numbers of offspring
c.
high offspring mortality
d.
give very little parental care
e.
long gestation periods
 

 16. 

The biotic potential of a population
a.
is the current rate of growth of a population
b.
is the maximum reproductive rate of a population
c.
is an expression of how many offspring survive to reproduce
d.
is the future rate of growth of a population
e.
can be determined only by studying an age structure diagram.
 

 17. 

Carrying capacity refers to
a.
interaction of natality and mortality
b.
the intrinsic rate of increase
c.
the proportion of males to females
d.
reproductive rate
e.
the maximum size of population the environment will support
 

 18. 

A population crash occurs when
a.
The population growth rate slows.
b.
Resources are essentially unlimited.
c.
A population approaches its carrying capacity.
d.
A population greatly overshoots carrying capacity, and resulting environmental pressures cause effects.
e.
Environmental resistance comes into play gradually.
 

 19. 

Which of the following is NOT a likely explanation as to why most populations in nature exhibit clumped dispersion patterns?
a.
Important natural resources can also be clumped in nature.
b.
It ensures that members of the same species are always available for reproductive efforts.
c.
Living and hunting in packs improves the success rate of some predators.
d.
This allows for protection against potential predators in that there is safety in large groups.
e.
All of these are likely explanations as to why many species exhibit clumped dispersion patterns.
 

 20. 

Which of the following factors leads to an increase in biotic potential?
a.
low reproductive rate
b.
specialized niche
c.
too many competitors
d.
optimal level of critical nutrients
e.
too much or too little light
 

 21. 

A population will increase if
a.
mortality increases
b.
the biotic potential increases
c.
the environmental resistance increases
d.
natality decreases
e.
all of these answers
 

 22. 

Which of the following is the most commonly exhibited population dispersion pattern in nature?
a.
elongated
b.
clumped
c.
circular
d.
uniform
e.
random
 

 23. 

An exponential growth curve depicting an ever-growing population is shaped like the letter ____.
a.
S
b.
L
c.
J
d.
U
e.
M
 

True/False
Indicate whether the statement is true or false.
 

 24. 

Most populations live in patches.
 

 25. 

Most populations live in clumps.
 

 26. 

When calculating population change, deaths and immigration are added together and both births and emigration are subtracted.
 

 27. 

Logistic growth has a s-shaped growth curve.
 

 28. 

Logistic growth has a j-shaped growth curve.
 

 29. 

When calculating population change, births and immigration are added together and both deaths and emigration are subtracted.
 

 30. 

Exponential growth has a s-shaped growth curve.
 

 31. 

Another name for exponential growth is logistic growth.
 

 32. 

Another name for exponential growth is geometric growth.
 

 33. 

Organisms with random distributions are fairly common.
 

 34. 

When calculating population change, births and emigration are added together and both deaths and immigration are subtracted.
 

 35. 

Exponential growth has a j-shaped growth curve.
 

 36. 

Organisms with random distributions are fairly rare.
 



 
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