Exam 16: Prokaryotes: the First Single-Celled Creatures

Viruses contain ________ as their genetic material.

Prokaryotes that obtain their energy by oxidizing inorganic substances,such as prokaryotes that oxidize hydrogen sulfide in volcanic vents,are the:

All of the following are correct about biofilms except:

All of the following are correct about eukaryotes EXCEPT:

Once they evolved,the _____________ forever changed the atmosphere on Earth.

Viruses can enter animal cells by:

Bats are a healthy carrier for which of the following diseases?

Vibrio cholerae usually exists in a harmless form until:

The HIV enzyme,________________ manufactures a DNA copy of the virus once it is inside a human cell.

In __________________,atmospheric nitrogen is converted to a more usable form.

Viral genomes can be of DNA or ___________.

Scientists suspect that the first macromolecules to form when cells first arose were:

A type of Archaea,known as _________________,use hydrogen gas to reduce carbon dioxide to methane.

____________________ is a disease of the respiratory tract caused by the bacterium Mycobacterium tuberculosis.

Describe what scientists feel may be the first step in the evolution of cellular organization.

Which type of cells is the HIV virus able to infect?

______________ consist of a core of segments of DNA or RNA surrounded by a protein coat.

The simplest and most abundant form of life on Earth today are the:

Smallpox was eliminated as a disease because of inoculations and the fact that:

All of the following are correct about gram-positive bacteria except: