Exam 16: Microbial Life: Prokaryotes and Protists

Which is a member of the domain Archaea?

What mode of nutrition would you predict that a prokaryote would use if it is placed in an aquatic environment that has moderate sunlight availability as well as dead plant material?

Multicellular organisms evolved from three different ancestral lineages: stramenopiles, unikonts, and archaeplastids. Of these, fungi and animals evolved from two different lineages of ________, and land plants are ________.

Prokaryotic cell walls function

Many species of which protist group have modified mitochondria that lack functional electron transport chains?

You take a 1-mL sample of pond water and add it to a colorless, viscous media in a small petri dish. When you place it under your dissecting microscope, you see three organisms. Two are struggling to move efficiently through the media, while the third moves more quickly. You attribute the faster movement to the third organism's

Individual prokaryote cells are ________ eukaryote cells; collectively, all prokaryote cells on Earth ________.

A layer of organized colonies of bacteria coating a surface is also known as a

________ are toxic proteins secreted by pathogenic bacteria, and ________ are toxic components of the outer membrane of gram-negative bacteria.

Plasmodium, the organism that causes malaria, is a(n)

Intestinal gas is evidence of active ________ in some animals' digestive tracts.

Textile mills often release dye color and toxic by-products into rivers and streams, which may then taint groundwater. Fungi associated with mangrove trees have been shown to reduce both colors and toxicity in tainted groundwater. -Suppose that fungal treatment was added to stream water contaminated from a textile mill. The toxins in the water tend to lower pH levels, and scientists wanted to study how adding the fungal treatment affected stream pH levels. pH levels were recorded every year for five years. Results indicated that the acidity of the stream water decreased from pH 2.5 in the first year to pH 5.9 by the fifth year. Scientists concluded that

The main ingredient of crude oil is

A patient visits her doctor complaining of stomach cramps, vomiting, and nausea. When he takes a bacterial sample, he determines that Escherichia coli bacteria have used their ________ to attach to the cells lining her gastrointestinal tract.

There is a good chance you will eat carrageenan today and that you will eat nori at some point in your life, if you haven't already. In either case, you will be eating a product of

The term for a close association between organisms of two or more species is

You hang a microscope slide from a submerged, L-shaped PVC pipe in lake water that is 2 feet deep. The slide hangs 6 inches below the surface of the water and remains there for eight weeks. When you remove it and bring it to your lab for observation, you see that algae, bacteria, and even some fungi have colonized the slide. You determine that you are looking at a(n)

Dunaliella salina is a bacterium that is able to live in aqueous solutions with such high salt concentrations that the salt cannot fully dissolve. D. salina is an example of a(n)

A bacterium living in an underground septic tank thrives by absorbing organic compounds from decomposing wastes. What is it?

When snapping shrimp are building their homes in the seafloor, goby fish keep guard and flap their tails when danger is approaching. As part of this relationship, the shrimp allow the gobies to sleep in the burrow and use it for cover from predators. This is an example of