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TLS Online TPP Program

#Question id: 355

Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. 10^-10 M

  2. 10^-4 M

  3. 10^-7 M

  4. 10.0 M

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TLS Online TPP Program

#Question id: 12602

#Unit 10. Ecological Principles

Aquatic primary productivity is most limited by which of the following?
TLS Online TPP Program

#Question id: 12601

#Unit 10. Ecological Principles

The total biomass of photosynthetic autotrophs present in an ecosystem is known as
TLS Online TPP Program

#Question id: 12600

#Unit 10. Ecological Principles

Ecosystems are
TLS Online TPP Program

#Question id: 12599

#Unit 10. Ecological Principles

What is the most important role of photosynthetic organisms in an ecosystem? 
TLS Online TPP Program

#Question id: 12563

#Unit 10. Ecological Principles

How does phosphorus normally enter ecosystems? 
TLS Online TPP Program

#Question id: 12562

#Unit 10. Ecological Principles

In the nitrogen cycle, the bacteria that replenish the atmosphere with N