TLS Online TPP Program

#Question id: 9209


Introduced species can have deleterious effects on biological communities by ________.

#Section 2: Evolution
  1. competing with native species for resources and displacing them
  2. spreading rapidly in their new region
  3. reducing erosion
  4. increasing the biodiversity in their new region
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TLS Online TPP Program

#Question id: 11248

#Section 1: Ecology

Which factor could not be considered a factor of environmental resistance?

TLS Online TPP Program

#Question id: 11249

#Section 1: Ecology

Choose the density-dependent factor that will slow population growth as population size increases.

TLS Online TPP Program

#Question id: 10688

#Section 1: Ecology

For two species A and B in competition, the carrying capacities, competition coefficients, per capita growth rate and population size are

KA = 1000           KB = 1200    α of B= 1     β of A= .5       rB= .5         r A= .3                

AN= 500                  BN= 200

According to the Lotka-Volterra model, what is growth rate of species A?

TLS Online TPP Program

#Question id: 10690

#Section 1: Ecology

Which of following interaction shown in following species of Paramecium?



TLS Online TPP Program

#Question id: 10693

#Section 1: Ecology

The diagram represents competition between species 1 and species 2 according to Lotka-Volterra model of competition


Given the conditions in the diagram, the predicted outcome of competition is


TLS Online TPP Program

#Question id: 10696

#Section 1: Ecology

In a new area two species A and B was discovered and taking energy from another species X and Y respectively. Following some is life history trait of species.

I- A species is often larger than X

II- Each A species taking energy from many X

III- One Y usually supports populations of B species

IV- Fatality of Y is Mild to severe

Which of the following is correct observation of above species?