Exam 1: The Microbial World

During nitrogen fixation,microorganisms convert:

In which molecule is the occurence of mutation most likely to be detected and repaired?

Which best describes a photoautotroph?

Phosholipid structure in Archaean cells suggests relatedness to:

The three domains of life are ________,________,and ________.

One limitation to the knowledge gained through "non-cultivation-based" genomic research is:

Approximately when did primitive cells first appear on Earth?

Prior to World War II,the greatest cause of death during wartime has been:

Which of these is considered to be the smallest unit of life?

Which of these are key factors in explaining the similarity between death rates in the world versus sub-Saharan Africa in the 1930s? (Select all that apply)

Despite advances in medical science,there has been a slight increase in deaths from infectious disease in the USA in recent decades.Resaons for this include: (Select all that apply)

Viruses may be considered non-living for all of the following reasons EXCEPT that they: (Select all that apply)

The development of which vaccine would most dramatically reduce death rates in sub-Saharan Africa?

What percent of the dry weight of the cell is composed of DNA?

The discovery of ribozymes provides evidence that life on the early Earth may have been based on:

Which abilities might provide plausible mechanisms to explain the endosymbiont phenomenon? (Select all that apply0

Figure B1.1 represents an artist's attempt to illustrate the process of PCR.How many errors/omissions do you notice in this figure? (Select all that apply)

The main difference between the two cell types,prokaryote and eukaryote,is the presence of a ________________ in the eukaryote.

Which of these are fossilized microbial mats containing photosynthetic bacteria?

Which of these are key factors in explaining the discrepancy between death rates in the world versus sub-Saharn Africa in the 21ˢᵗ century? (Select all that apply)