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TLS Online TPP Program

#Question id: 11768

As documented by peter and rosemary grant, the population of the medium ground finch on the tiny island of Daphne major in the Galápagos archipelago responded how to changes in food resources associated with climate changes:

#Unit 10. Ecological Principles
  1. During the drought of 1975-1978, the population decreased
  2. The average beak size of surviving individuals, and their progeny, increased significantly between 1976 and 1978
  3. During the exceedingly wet El niño year of 1983, birds with smaller beaks handled the abundant smaller seeds more efficiently and the average beak size of the population returned to a lower value
  4. All of the above
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TLS Online TPP Program

#Question id: 13233

#Unit 6. System Physiology – Plant

Tracheids are
TLS Online TPP Program

#Question id: 13234

#Unit 6. System Physiology – Plant

Some roots can develop positive hydrostatic pressure in their xylem is called
TLS Online TPP Program

#Question id: 13235

#Unit 6. System Physiology – Plant

Few statements regarding water potential of soil
a) The osmotic potential (Ys) of soil water is generally negligible because solute concentrations are low
b) In wet soils the Hydrostatic pressure (Yp) of soil water is close to zero
c) In dry soils the Hydrostatic pressure (Yp) of soil water is negligible
d) ) The osmotic potential (Ys) of soil water is generally positive because solute concentrations are low
 Which one of the following combination of above statements is TRUE?
TLS Online TPP Program

#Question id: 13551

#Unit 6. System Physiology – Plant

As water is lost to the air, the surface of the remaining water is drawn into the interstices of the cell wall, where it forms curved air–water interfaces
TLS Online TPP Program

#Question id: 13552

#Unit 6. System Physiology – Plant

Transpiration from the leaf depends on two major factors;
TLS Online TPP Program

#Question id: 13553

#Unit 6. System Physiology – Plant

According this graph which statements is most appropriate ;


a) The air surrounding the leaf is very still, the layer of unstirred air on the surface of the leaf may be so thick that it is the primary deterrent to water vapor loss from the leaf   
b) The air surrounding the leaf is very still, reduces the thickness of the boundary layer at the leaf surface, reducing the resistance of this layer
c) The moving air reduces the thickness of the boundary layer at the leaf surface, reducing the resistance of this layer    
d) The moving air, the layer of unstirred air on the surface of the leaf may be so thick that it is the primary deterrent to water vapor loss from the leaf