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TLS Online TPP Program

#Question id: 7141

Engrailed comes to be expressed in posterior compartments during Drosophila embryogenesis; what is the consequence of engrailed activation of hedgehog (Hh) signaling from the posterior compartment of the wing disc?

#Unit 5. Developmental Biology
  1. Hh activates decapentaplegic (Dpp) signaling at the compartment boundary; Dpp then acts as a morphogen to pattern the development of veins in the wing blade.
  2. Hh signaling from the posterior compartment specifies the adjacent compartment as an anterior compartment.
  3. Hh signaling in the posterior compartment acts as a morphogen to pattern the posterior portion of the wing.
  4. Hh signaling controls the identity of the Imaginal discs, in this case, specifying the disc as the wing disc.
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TLS Online TPP Program

#Question id: 7505

#General Aptitude

A train running at 54 kmph takes 20 seconds to pass a platform .Next it takes 12 seconds to Pass a man walking at 6 kmph in the same direction in which the train is going. Find the length of the train and the length of the platform.
TLS Online TPP Program

#Question id: 7506

#General Aptitude

A man sitting in a train which is travelling at 50 kmph observes that a goods train,travelling In opposite direction,takes 9 seconds to paas him. If the goods train is 280 m long,Find its speed.
TLS Online TPP Program

#Question id: 7507

#General Aptitude

The lengths of trains A and B are 250 m 300 m respectively and their speeds are 70 km/h and 79 km/h respectively. They are walking in the same direction. In how much time will train B cross a passenger sitting in A?
TLS Online TPP Program

#Question id: 7508

#General Aptitude

A boat running downstream covers a distance of 12 km in 2 h while for covering the same distance upstream it takes 3 h. What is the speed of the boat in still water?
TLS Online TPP Program

#Question id: 7509

#General Aptitude

A boatman goes 3 km against the current of the stream in 1 h and goes 1 km along the current in 15 min. How long will it take to go 7 km in stationary water?
TLS Online TPP Program

#Question id: 7510

#General Aptitude

A boat running upstream takes 5 h 12 min to cover a certain distance, while it takes 4 h to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?