The two-experiment performed by a scientist with a forelimb mesenchyme and seeing their results;

I-leg mesenchyme is placed directly beneath the wing AER

II-limb mesenchyme is replaced by non-limb mesenchyme beneath the AER

Conclusion of these experiment are seeing; 

a) distal hindlimb structures develop at the end of the limb

b) supernumerary structures are formed, usually toward the distal end of the limb

c) the AER regresses and limb development ceases

Select the correct result about these experiments-

TLS Online TPP Program

#Question id: 12762

#Unit 10. Ecological Principles

Find  appropriate option for  given question . The figure above depicts the intensity versus frequency curve of an a2coustical receptor of the larva of a noctuid moth. The larva is preyed on by a wasp whose vibrating wings produce a0buzz.

On the basis of the figure, it can be predicted that the wasp buzz 1has a frequency

TLS Online TPP Program

#Question id: 12763

#Unit 10. Ecological Principles

The life history traits favoured by selection are most likely to vary with

TLS Online TPP Program

#Question id: 12764

#Unit 10. Ecological Principles

In which of the following habitats would you expect to find the largest number of K-selected individuals? 

TLS Online TPP Program

#Question id: 12765

#Unit 10. Ecological Principles

Which of the following characterizes relatively K-selected populations?

TLS Online TPP Program

#Question id: 12766

#Unit 10. Ecological Principles

Which of the following statements about the evolution of life histories is correct? 

TLS Online TPP Program

#Question id: 12767

#Unit 10. Ecological Principles

Your friend comes to you with a problem. It seems his shrimp boats aren’t catching nearly as much shrimp as they used to. He can’t understand why because originally he caught all the shrimp he could handle. Each year he added a  new  boat,  and  for  a  long  time  each  boat  caught  tons  of  shrimp.  As  he  added  more  boats,  there  came  a  time when each boat caught somewhat fewer shrimp, and now, each boat is catching a lot less shrimp. Which of the following topics might help your friend understand the source of his problem?