Which one of the following  features of an early community?

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#Question id: 9261

#Unit 9. Diversity of Life Forms

Which of the following statements about horizontal gene transfer is accurate?

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#Question id: 9192

#Unit 9. Diversity of Life Forms

The oak tree pathogen Phytophthora ramorum has migrated 650 km in ten years. West Nile virus spread from New York State to 46 others states in five years. The difference in the rate of spread is probably related to

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#Question id: 20295

#Unit 7. System Physiology – Animal

Catecholamines can lead to hyperglycemia due to: 

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#Question id: 599

#Unit 1. Molecules and their Interaction Relevant to Biology

In a certain enzyme-catalyzed reaction the following steps occur:

1. A phosphate group on substrate A is transferred to a side chain of an active site residue of the enzyme.

2. The dephosphorylated form of substrate A dissociates from the enzyme.

3. Substrate B enters the active site and is phosphorylated with simultaneous regeneration of the enzyme in its original form.

What kind of kinetic mechanism is described?

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#Question id: 15606

#Unit 12. Applied Biology

A biopolymer which is stable in extreme physical and chemical environments, and exhibits physical and chemical properties similar to those of a plastic known as