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TLS Online TPP Program

#Question id: 12426

In an ecosystem, fixed carbon has accumulated in the form of organic matter derived from dead plants and animals. Which of the following is the best explanation for this observation? 

#Unit 10. Ecological Principles
  1. Decomposer activity has been low.
  2. Producers have been utilizing sunlight inadequately.
  3. There have been insufficient numbers of secondary consumers. 
  4. Primary consumers have been absent from the ecosystem.
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TLS Online TPP Program

#Question id: 10510

#Unit 6. System Physiology – Plant

Constitutive chemical defenses are effective against many different herbivores, including insects and mammals. Hemlock (Cicuta sp.) produces which toxins that a polyacetylene prolongs the repolarization of neuronal action potentials.
TLS Online TPP Program

#Question id: 1156

#Unit 4. Cell Communication and Cell Signaling

Which of the following mechanisms cannot terminate an intracellular signaling pathway once the concentration of an external signal decreases?
TLS Online TPP Program

#Question id: 32238

#Unit 2. Cellular Organization

Resident ER membrane proteins contain retrieval signals, called:
TLS Online TPP Program

#Question id: 21272

#Unit 12. Applied Biology

The acoustic wave biosensors are type of _____________ based sensors?
TLS Online TPP Program

#Question id: 23251

#Unit 13. Methods in Biology

Which enzyme degrades the resulting component dNTPs and ATP if not incorporated in chain.