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TLS Online TPP Program

#Question id: 13020

Experts in deer ecology generally agree that population sizes of deer that live in temperate climates are limited by winter snow. The deer congregate in ?yarding? areas under evergreen trees because venturing out to feed in winter is energetically too expensive when snowfall depths accumulate to above 40 cm. Deer often stay yarded until the spring thaw. Snow depth over 40 inches for more than 60 days results in high mortality due to starvation.  This observation best illustrates which of the following principles about factors that limit distribution of organisms?

#Unit 10. Ecological Principles
  1. Abiotic factors, such as weather extremes, ultimately limit distribution.
  2. Organisms will face extinction unless they adapt to conditions or evolve new mechanisms for survival. 
  3. Environmental factors are limiting not only in amount but also in longevity.
  4. Daily accumulations in snow depth gradually add up to cause increased deer mortality
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TLS Online TPP Program

#Question id: 24576

#Unit 10. Ecological Principles

The birth of 100 cockroaches to a population of 1,000 would represent a birth rate. Similarly, the death of 50 cockroaches in a population of 1,000 would be a death rate, d, per individual per week. Calculate the rate of change in a population per unit time ?
TLS Online TPP Program

#Question id: 24575

#Unit 10. Ecological Principles

If the initial population size 1000 then given population birth rate is 0.55, and death rate is 0.45, then calculate the change in population per unit time?
TLS Online TPP Program

#Question id: 24574

#Unit 10. Ecological Principles

If number of birds in the population N0= 100 next year ecologists count 110 birds in the same population, consider a population of birds growing at a rate of 5% per year. After 5 years how many birds would there be?
TLS Online TPP Program

#Question id: 24573

#Unit 10. Ecological Principles

Calculate the finite rate of increase, if ecologists count the number of birds in the population, N0= 100, the next year ecologists count 110 birds in the same population, 
TLS Online TPP Program

#Question id: 24572

#Unit 10. Ecological Principles

Find out the characteristics of geometric growth?
a. It can grow for both periodic and continuous breeders
b. depends on the activity of net reproductive growth rate
c. unlimited Population Growth Leads to J-shaped
d. unlimited Population Growth Leads to S-shaped
e. resources are not limited
TLS Online TPP Program

#Question id: 24571

#Unit 10. Ecological Principles

In which case the population eventually decline to extinction?