Genetic variation in bacterial populations cannot result from

a. Transduction

b. Conjugation

c. Mutation

d. Meiosis

Photoautotrophs use

a. 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

Which of the following statements is not true?

a. Archaea and bacteria have different membrane lipids.

b. The cell walls of archaea lack peptidoglycan.

c. Only bacteria have histones associated with DNA.

d. Only some archaea use CO₂ to oxidize H₂, releasing methane.

Which of the following statements is true?

a. Archaea and bacteria have identical membrane lipids.

b. The cell walls of archaea lack peptidoglycan.

c. Prokaryotes have low levels of genetic diversity.

d. No archaea are capable of using CO₂ to oxidize H₂, releasing methane.

Which of the following involves metabolic cooperation among prokaryotic cells?

a. Binary fission

b. Endospore formation

c. Biofilms

d. Photoautotrophy

Bacteria perform the following ecological roles. Which role typically does not involve symbiosis?

a. Skin commensalist

b. Decomposer

c. Gut mutualist

d. Pathogen

Which of the following describes a bacterium that lives in the human intestine and causes disease? (A)commensalist (B)decomposer (C)gut mutualist (D)symbiotic pathogen

Plantlike photosynthesis that releases O₂ occurs in

a. Cyanobacteria

b. Archaea

c. Gram-positive bacteria

d. Chemoautotrophic bacteria