Exam 4: Bacterial Culture, Growth, and Development

When the population doubles during each given unit of time, the growth is

Why does a microbe's growth rate in its natural environment vary greatly from that in the laboratory? Give at least two reasons for this.

The best method to isolate single colonies is the ________ plate, and the best method to count colonies is the ________ plate.

Which of the following is a micronutrient?

Compare and contrast complex media, synthetic media, and enriched media.

All known microorganisms have a set of genes coding for ________, whose RNA sequences are highly conserved across the phylogenetic tree.

Quorum sensing is triggered in biofilms when

There is a constant struggle to survive in natural habitats because of a lack of

The figure below represents what type of differentiation?

How does Anabaena overcome the challenge of performing both photosynthesis and nitrogen fixation?

The most common form of chemical energy is contained in the high-energy phosphate bonds of

Define the terms "viable" and "viable but unculturable." Why are so many environmental organisms believed to be viable but unculturable?

Which term refers to the condition in which a culture growth covers the entire agar surface?

Growth of most microorganisms occurs by

During the stationary phase, E. coli reprograms itself. What does it do to protect itself?

You are measuring growth in a bacterial culture. The number of viable cells remains constant, and when you check the medium, you find that the carbon source has been used up. In which phase of growth is the culture?

When the intracellular iron concentration is low, iron-scavenging molecules called ________ are produced.

A(n) ________ is an organism that lives in an intimate association with a second organism.

Which of the following are specific nutrients NOT required by other species?

Left on their own, heterotrophs would deplete the world of ________ sources and starve to death.