Ticks that live on deer and field mice are responsible for spreading the bacterium __________, which causes __________.

Which statement about prokaryotes is true?

Prokaryotes are completely indispensable to which chemical cycle?

A type of ecological relationship called __________ involves one organism living at the expense of another organism.

Which of the following statements about cyanobacteria is/are true?

Which example below is a correct statement about Bacteroides thetaiotaomicron, a bacterium that lives in the human intestines?

Which statement is true regarding cholera?

What do some photosynthetic bacteria use as a source of electrons instead of water?a. oxygen (O2)b. hydrogen sulfide (H2S)c. organic compounds (e.g., CH3COO−)d. nitrate (NO3-)

Photoautotrophs usea. light as an energy source and CO2 as a carbon source.b. light as an energy source and methane as a carbon source.c. N2 as an energy source and CO2 as a carbon source. d. CO2 as both an energy source and a carbon source.