Chapter 10

If two organisms have similar rRNA sequences, you can conclude that they

Which of the following is the best evidence for a three-domain system?

Fossil evidence indicates that prokaryotic cells first existed on the Earth

in the figure, the closest ancestor for both species "a." and species "b." would be which of the following?

In the table, which features are found in nearly all eukarya?

Into which group would you place a photosynthetic organism that lacks a nucleus and has a thin peptidoglycan wall surrounded by an outer membrane?

What is the outstanding characteristic of the Kingdom Fungi?

Which of the following statements about members of the Kingdom Plantae is FALSE? They synthesize organic molecules. They are multicellular. They are composed of eukaryotic cells. They use organic carbon sources. They undergo photosynthesis.

Which of the following statements about the members of the Kingdom Animalia is FALSE? They undergo photosynthesis. They are heterotrophs. They ingest nutrients through a mouth. They are multicellular. They are composed of eukaryotic cells.

A bacterial species differs from a species of eukaryotic organisms in that a bacterial species

Which of the following best defines a strain in microbiological terms?

Which statement regarding viral species is true? Viral species are not classified as part of any of the three domains. Viral species are taxonomically differentiated based upon their cell wall. Viruses are classified as prokaryotes. Viral species are classified within the Kingdom Plantae in the Domain Eukarya.

T/F Pure cultures of the same species are not always identical in all ways.

Organism A has 70 moles % G+C, and organism B has 40 moles % G+C. Which of the following can be concluded from these data?

Nucleic acid hybridization is based on the fact that

in the figure, which figure shows the most closely related organisms?

in the figure, which two are most closely related?

Use the dichotomous key in the table to identify a gram-negative coccus.

Consider a gram-negative pathogen isolated from marine mammals. This pathogen is subjected to a series of tests and found to have the following characteristics: oxidase-positive, does not hydrolyze urea, produces indole, does not produce acetoin. Which of the following could it be?

sort groups of organisms into the correct domain. -Archaea, Bacteria, Eukarya -hyperthermophiles, methanogens, extreme halophiles cyanobacteria, gram-positive bacteria, proteobacteria fungi, green algae, ciliates, slime molds

Which of the following is NOT a characteristic of members of the Domain Archaea? They carry out unusual metabolic processes. They contain distinctive ribosomal RNA. They contain nuclei. They live in extreme environments.

A unicellular, photosynthetic nucleated cell would belong to which domain? Archaea Bacteria Eukarya

The first cells were formed approximately __________ years ago. 3 million 3 billion 2 billion