TLS Online TPP Program

#Question id: 12327


Which  of  the  following  is  the  most  accepted hypothesis as  to  why  invasive  species  take  over  communities into which they have been introduced?

#Section 1: Ecology
  1. Invasive species are more aggressive than natives in competing for the limited resources of the environment.
  2. Invasive species are not held in check by the predators and agents of disease that have always been in place for the natives.
  3. Humans always select which species will outcompete the nuisance native species. 
  4. Invasive species have a higher reproductive potential than native species.
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TLS Online TPP Program

#Question id: 10754

#Section 2: Evolution

Following is different type of interaction was shown in figure. (+: Benefit , - Harm , 0= Neither benefit nor harm) What is interaction between column A & B in each schematic?


TLS Online TPP Program

#Question id: 10755

#Section 2: Evolution

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= .5    r A= .3    N1= 500         N2= 200          

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

TLS Online TPP Program

#Question id: 10814

#Section 2: Evolution

A Population of N1 species is growing with N2 species with a growth rate (r1) of 0.15 in an environment with a carrying capacity K1 of 400, Density of N1 species 100, density of N2 species 50 competitive efficiency of N2 on N1 species 1.5. What is the approximate growth rate N1 species?

TLS Online TPP Program

#Question id: 10815

#Section 2: Evolution

The evolution of two interacting species in a community is referred to as ________________.

TLS Online TPP Program

#Question id: 10816

#Section 2: Evolution

When a harmless species takes advantage by resembling the aposematic coloration of other species that are toxic, it is called _____________________.

TLS Online TPP Program

#Question id: 10817

#Section 2: Evolution

Removal of a __________________ from a community affects community structure significantly.