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TLS Online TPP Program

#Question id: 23770

What is the function of rods and cones in the eye?

#Unit 7. System Physiology – Animal
  1. Cones are responsible for vision at low light levels or scotopic vision & the rods are responsible for vision at higher light levels or photopic vision.
  2. Rods are responsible for vision at low light levels or scotopic vision & the cones are responsible for vision at higher light levels or photopic vision.
  3. Cones are responsible for vision at higher light levels or scotopic vision & the cones are responsible for vision at low light levels or photopic vision.
  4. Rods are responsible for vision at higher light levels or scotopic vision & the cones are responsible for vision at low light levels or photopic vision.
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TLS Online TPP Program

#Question id: 23332

#General Aptitude

In Epistemology, the following problem can be solved
TLS Online TPP Program

#Question id: 16119

#Unit 7. System Physiology – Animal

Following statements are regarding to Shivering, which is the most potent mechanism for increasing heat production in the body. 
A. Cold environmental temperatures activate centers in the posterior hypothalamus during shivering, which then activate the α and γ motoneurons innervating skeletal muscle. 
B. Shivering involves skeletal muscle contracts rhythmically, generating heat and raising body temperature.
C. Shivering involves stimulation of Na+-K+ ATPase and raising body temperature.
D. Shivering involves stimulation of β receptors in brown fat, which increases metabolic rate and heat production.
Which of the following combination is correct?
TLS Online TPP Program

#Question id: 5805

#Unit 8. Inheritance Biology

In Himalayan rabbits, the ears, feet, and muzzle are pigmented while the rest of the body is white. This is because they express an enzyme variant that is ineffective at body temperature but functions at the lower temperatures experienced by cells of the extremities. This is an example of:
TLS Online TPP Program

#Question id: 19213

#Unit 12. Applied Biology

In Agrobacterium tumefaciens Crown gall formation is the consequence of
TLS Online TPP Program

#Question id: 3259

#Unit 11. Evolution and Behavior

Different type of evolution leads to group of taxon in following three manners

A- group of taxon whose member have descended from common ancestor

B- when two lineages convergently  evolve similar character states form  groups that are recognized by pheneticists

c. taxon that include most recent ancestor but not all of its descendent