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TLS Online TPP Program

#Question id: 12428

Flycatcher birds that migrate from Africa to Europe feed their nestlings mostly with moth caterpillars. The data presented show the mean dates of egg laying, hatching, and fledging of flycatcher young, and the 1980 and 2000 peak mass of caterpillars.

Why are ecologists  concerned about the shift in  date from May 28 in  1980 to May 15 in  2000 of the caterpillar peak mass?

#Unit 10. Ecological Principles
  1. The  caterpillars will  eat  much of  the  foliage of  the  trees where flycatchers nest, and  their  nests will  be more open to predation.
  2. The earlier hatching of caterpillars will compete with other insect larval forms on which the flycatchers also feed their young.
  3. The flycatcher nestlings in 2000 will miss the peak mass of caterpillars and may not be as well fed.
  4. The flycatchers will have to migrate sooner to match their brood-rearing season with the time of caterpillar peak mass.
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TLS Online TPP Program

#Question id: 10751

#Unit 10. Ecological Principles

Possible interaction between populations in following manner ,which of the following best represent for negative ineteracion ?
TLS Online TPP Program

#Question id: 10752

#Unit 10. Ecological Principles

Which of the following is an example of Batesian mimicry?

A) a butterfly that resembles a leaf

B) a nonvenomous larva of a moth that moves like a venomous snake

C) a fawn with fur coloring that camouflages it in the forest environment

D) a snapping turtle that uses its tongue to mimic a worm, thus attracting fish
TLS Online TPP Program

#Question id: 10753

#Unit 10. Ecological Principles

Which of the following is correct combination? 
TLS Online TPP Program

#Question id: 10754

#Unit 10. Ecological Principles

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

#Unit 10. Ecological Principles

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: 10756

#Unit 10. Ecological Principles

Which of following is correct about interaction?

A) Population growth of each species is limited more by intraspecific competition than by interspecific competition.

B) The species with the greater initial abundance wins out.

C) Population of each species coexist and reach at stable equilibrium point

D) Population growth of each species is limited by only intraspecific competition