BIOL Ch. 18

Archaeans have been found

- in acidic environments - in cold environments - in hot environments ( All are correct )

Prokaryotes can be found in which of the following environments?

- intestines - glaciers - miles underground ( All are correct )

Lost City is located

- on top of a submerged mountain. - on the mid-Atlantic ridge. - at a depth of 2,600 feet. ( All are correct )

The habitats surrounding a deep-sea hydrothermal vent support differing microbial communities because of variations in

- pH - methane concentration - temperature ( All are correct )

Which statement about prokaryotes is FALSE?

All prokaryotes are bacteria

A scientist who wants to understand what the earliest forms of life might have been like would most likely want to study members of domain

Archaea

Although prokaryotes survive in many different environments, ______ have been called "extremophiles" and have their own domain.

Archaea

The term "halophile" means "salt-loving" and describes organisms that live in extremely salty environments. Knowing this, you would expect a halophile to be a member of domain

Archaea

Which two domains contain prokaryotic organisms?

Bacteria and Archaea

A prokaryote has all of the following structures, EXCEPT

Cell wall

This structure differs in its composition in Archaea and Bacteria.

Cell wall

Which is NOT true of prokaryotes?

Exclusive to land

Most of the organisms found at Lost City are

Prokaryotes

Which organism would most likely NOT be found at or near a deep-sea hydrothermal vent?

aerobic bacteria

Prokaryotic cells are found in which of the following domains?

bacteria & archaea

Which of the following does NOT refer to a prokaryotic organism?

has organelles

The term "extremophiles" refers to

members of domain Archaea

At least some Archaeans are called "extremophiles" because

they can live in environments where abiotic conditions are extreme--extremely hot, extremely salty, extremely toxic, for example.