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TLS Online TPP Program

#Question id: 12620

As N approaches K for a certain population, which of the following is predicted by the logistic equation? 

#Unit 10. Ecological Principles
  1. The growth rate will not change. 
  2. The growth rate will approach zero.
  3. The population will show an Allee effect. 
  4. The population will increase exponentially.
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TLS Online TPP Program

#Question id: 19882

#Unit 13. Methods in Biology

The vector containing the DNA fragment to be cloned
TLS Online TPP Program

#Question id: 11042

#Unit 7. System Physiology – Animal

A decrease in which of the following tends to increase pulse pressure?
TLS Online TPP Program

#Question id: 12198

#Unit 6. System Physiology – Plant

In theory, auxin could increase the rate of proton extrusion by some possible mechanisms such as:
a) Activation of pre-existing plasma membrane H+- ATPases
b) Synthesis of new H+-ATPases on the plasma membrane
c) Auxin-Induced Proton Extrusion May Involve Both Activation and Synthesis
TLS Online TPP Program

#Question id: 5305

#Unit 11. Evolution and Behavior

After finding a new medicinal plant, a pharmaceutical company decides to determine if the plant has genes similar to those of other known medicinal plants. What would annotation of the genome of this plant allow the company to determine?
TLS Online TPP Program

#Question id: 15337

#Unit 4. Cell Communication and Cell Signaling

HSCs express which type of cell-surface molecule, which is the receptor for stem cell factor (SCF). It is a cytokine that exists in both membrane-bound and soluble forms and the SCF-surface molecules interaction is critical for the development, in adult animals, of multipotential progenitor cells (MPPs).  Which type of surface molecules HSCs express?