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TLS Online TPP Program

#Question id: 11282

Which of the following ecosystems would likely have the largest net primary productivity per hectare and why?

#SCPH28 | Zoology
  1. open ocean, because of the total biomass of photosynthetic autotrophs
  2. grassland, because of rapid growth, the small standing crop biomass that results from consumption by herbivores, and rapid decomposition
  3. tundra, because of the incredibly rapid period of growth during the summer season
  4. deep ocean, due to the high activity of chemoautotrophs at deep sea vents
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TLS Online TPP Program

#Question id: 1114

#SCPH01 Biochemistry

Sutherland discovered that the signaling molecule epinephrine is responsible for which of the following events?
TLS Online TPP Program

#Question id: 757

#SCPH01 Biochemistry

_______________ a bacterial enzyme, uses the energy of ATP hydrolysis to introduce negative supercoiling into DNA hence removing positive supercoiling generated during replication.
TLS Online TPP Program

#Question id: 1714

#SCPH05 I Biotechnology

In a lymph node, the antigen pneumococcus polysaccharide SIII leads to:
TLS Online TPP Program

#Question id: 5232

#SCPH28 | Zoology

Using molecular clock, it was estimated that two species X and Y must have diverged from their common ancestor about 5 x 10^6 years ago. If the rate of divergence per base pair is estimated to be 0.06 per million years, what is the proportion of base pairs that differ between the two species now?
TLS Online TPP Program

#Question id: 1631

#SCPH01 Biochemistry

Specific antibodies are readily detectable in serum following primary contact with antigen after: