Exam 2: A Brief Journey to the Microbial World

Explain why primary producers, especially those that undergo oxygenic photosynthesis, are essential for life on Earth.

A eukaryotic, chlorophyll- containing organism that can live in environments containing only a few minerals, water, carbon dioxide, and light is a(n)_________ .

Lichens are called mutualistic organisms because __________ .

Which of the following groups of organisms is NOT gram positive?

The most common type of microscopy for laboratory courses in biology and microbiology is done with the

The model organism for microbial physiology, biochemistry, and molecular biology is

Prokaryotic chromosomes are generally linear.

Protein- coding sequences of DNA are known as

One major difference between chromosomes and plasmids is that plasmids generally contain _________rather than _________genes.

In what way are the Thermoplasma like the Mycoplasma?

The waste products of chemoorganotrophs are often used for energy by chemolithotrophs.

Which organism has unusual cell walls, can reassemble its chromosome after it has been damaged, and has an innate resistance to high levels of radiation?

A tiny stylus positioned so close to a specimen that weak repulsive forces are established is used in

What type of energy- yielding metabolism is found ONLY in prokaryotes?

Viruses necessarily cause disease in the organisms they infect.

Organisms most likely to be found in extreme environments are

_________are a specialized cell type found in certain filamentous cyanobacteria that carry out a globally important process known as ________ .

Explain the concept of domain in relation to the tree of life.

When the oil- immersion lens is used,

Why are most of the "early branching" Eukarya pathogenic or parasitic?