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Exam 9: Population Ecology

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Question 21

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Why is the giant panda an endangered species? 

A)  It has a low birth rate and small litter size. 
B)  Its mating rituals are so complex that it rarely mates. 
C)  It has a large litter size but a high death rate because of predation. 
D)  It is a generalized species that eats only evergreen leaves.

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Question 22

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Which letter has the shape of a logistic growth curve that depicts a population limited by a definite carrying capacity? 

A)  S 
B)  L 
C)  J 
D)  M

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Question 23

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When does a population crash occur? 

A population's ____________________ structure can have a strong effect on how rapidly its size increases or decreases.

Many large mammal species that have long generation times and low reproductive rates are prone to ____________________.

One lesson biologists have learned from nature is that everything is connected to and interdependent with everything else.

All K-selected species have fewer,larger offspring than most other species.

Which factor leads to an increase in biotic potential? 

How have humans extended Earth's carrying capacity for the human species? 

SHEEP -Which letter in the graph corresponds to the portion of the curve that results from reproductive time lag?

Populations which have individuals evenly spaced throughout the environment have a(n)____________________ dispersal pattern.

The human population is likely to continue increasing at exponential rates indefinitely because of advances in our technology.

A species whose population size fluctuates slightly above and below its carrying capacity is said to have a fairly ____________________ population size.

A mammal reaches maturity after 10 years and bears only one or two young every two years.The parents and the rest of the herd protect the young.The type of survivorship curve that this animal would have is a(n)_________________________ curve.

Which connections would likely occur among population cycles,survival strategies,and survivorship curves? 

POPULATION -Which letter in the diagram corresponds to the point at which resources are not limiting and a population can grow at its intrinsic rate of increase?

What is a typical means by which humans interfere in the development of natural ecosystems? 

Metapopulations are spatially separated populations that may continue to exchange genes with each other through dispersal of individuals.

Which statement does NOT apply to whooping cranes? 

The biotic potential and the population size modified by the environmental resistance determine the _________________________.