ch. 19 quiz

Humans use bacteria in all of the following ways except. A. clean up small oil spills B. make butter and milk C. mine minerals from the ground D. synthesize drugs

make butter and milk

prokaryotes are single-celled organisms that lack a

nucleus

Two groups of prokaryotes that make their own food from inorganic molecules are

photoautotrophs and chemoautotrophs

Binary fission occurs when a bacterium

replicates its DNA and divides in half

what is NOT true about archaebacteria

they make up the largest kingdom of prokaryotes

the microorganisms called prokaryotes are

unicellular organisms that lack a nucleus

when treated with Gram strain, Gram-positive bacteria appear

violet

A method called Gram staining is used to tell

what kind of cell wall a prokaryote has

antibiotics are compounds that can

block the growth and reproductions of bacteria

Which of the following describes a role of bacteria in the environment

carrying out photosynthesis, recycling nutrients, fixing nitrogen

What is used to identify prokaryotes

cell shape and the way prokaryotes move

spherical prokaryotes are called

cocci

Bacteria that break down the nutrients in dead matter into simpler substance roots are called

decomposers

unlike photo autotrophs, chemoautotrophs obtain energy

directly from chemical reactions