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TLS Online TPP Program

#Question id: 7200

Following statements are regarding to Reaction-diffusion mechanism for proximal-distal limb specification. Which of the following statement is incorrect?

#Unit 5. Developmental Biology
  1. In the inhibitory domain immediately outside the AER, cells are kept dividing by FGFs and Wnts and are prevented from forming cartilage.
  2. In the active domain, each cell secretes but can not respond to activating paracrine factors of the TGF-β family (TGF-β, BMPs, activin) and cell adhesion factors such as galectin-1. These factors stimulate their own synthesis as well as that of the extracellular matrix and cell adhesion proteins that promote aggregation.

  3. The activating cells also stimulate the synthesis of diffusible inhibitors of aggregation (including Noggin and galectin-8), preventing cell adhesion in neighboring regions.

  4. A third domain, the “frozen zone” well beyond the influence of the AER, contains the formed cartilage primordia of the skeleton at proximal regions of the developing limb.
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TLS Online TPP Program

#Question id: 10749

#Unit 10. Ecological Principles

Which of the following observation of above experiment set is correct?


A) First set of experiment, N1 and N2 species are coexist

B) Second set of experiment, N1 and N2 species are coexist

C) Second set of experiment, N1 will be win

D) First set of experiment, population growth of each species is limited more by intraspecific competition than by interspecific competition
TLS Online TPP Program

#Question id: 10750

#Unit 10. Ecological Principles

Which of the following correct this model?


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?