In deep-sea hydrothermal vents near the Galapagos Islands, bacteria obtain energy by oxidizing hydrogen sulphide released from the vents. Giant tube worms, which lack mouths and digestive systems, harbour the bacteria in their tissues and use them as a source of organic molecules. Clams obtain energy by filtering bacteria directly from the water, and numerous crabs and octopi feed on the clams. In this unique ecosystem, the bactena are playing the role of

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#Question id: 15982

#Unit 12. Applied Biology

Which one of the following technique is used for inserting a foreign gene into a cell?

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#Question id: 11372

#Unit 9. Diversity of Life Forms

Which of the following use light energy to synthesize organic compounds from CO2?

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#Question id: 5240

#Unit 8. Inheritance Biology

If bacteria grow in the presence of a large amount of DNase, which of the following recombination process completely inhibited?

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#Question id: 11453

#Unit 7. System Physiology – Animal

Which type of receptor would you expect to be most abundant in the antennae of a moth?

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#Question id: 11235

#Unit 9. Diversity of Life Forms

In a bacterium that possesses antibiotic resistance and the potential to persist through very adverse conditions, such as freezing, drying, or high temperatures, DNA should be located within, or be part of, which structures?

1.  nucleoid region

2.  flagellum

3.  endospore

4.  fimbriae

5.  plasmids