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TLS Online TPP Program

#Question id: 9234

What is a critical load?

#Unit 9. Diversity of Life Forms
  1. the amount of nutrient augmentation necessary to bring a depleted habitat back to its former level
  2. the level of a given toxin in an ecosystem that is lethal to 50 percent of the species present
  3. the amount of added nutrient that can be absorbed by plants without damaging ecosystem integrity

  4. the number of predators an ecosystem can support that effectively culls prey populations to healthy levels

More Questions
TLS Online TPP Program

#Question id: 10779

#Unit 6. System Physiology – Plant

As plants absorb water from the soil, they deplete the soil of water near the surface of the roots, This depletion due to
TLS Online TPP Program

#Question id: 1568

#Unit 4. Cell Communication and Cell Signaling

which one of these is not a characteristics  of B-cell?
TLS Online TPP Program

#Question id: 1399

#Unit 4. Cell Communication and Cell Signaling

Loss-of-function mutations in which of the following genes typifies colorectal carcinomas?

a. myc              b. K-ras                       c. p53              d. APC
TLS Online TPP Program

#Question id: 10821

#Unit 10. Ecological Principles

What factor does not contribute to the rapid loss of nutrients from terrestrial ecosystems?
TLS Online TPP Program

#Question id: 4823

#Unit 8. Inheritance Biology

Which one of the following DNA markers can be used to distinguish between a homozygote and heterozygote ?