If an organism's diploid chromosome number is 18, how many different possible combinations of homologous chromosomes lining up during meiosis exist for the eggs or sperm produced by that organism?
a. 9
b. 18
c. 36
d. 128
e. 512
E; because to make a sperm or egg you have to make a choice between two homologous chromosomes nine times, or 29
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Which of the following statements is FALSE concerning enrichment bias?
A) Dilution of the inoculum may help to avoid enrichment bias in some cases. B) Enrichment bias is impossible to overcome in some oligotrophic environments. C) Enrichment bias resulted in the underestimation of prokaryotic diversity. D) Enrichment bias favors organisms that grow quickly.
Outline the various ways in which chromosomes can regulate how much of an enzyme is present at
any given time within a eukaryotic cell. What will be an ideal response?
___________________ are mutualistic fungi that help provide nutrients to trees, shrubs, and other plants
a. Epiphytes b. Rhizobia c. Mycorrhizae d. Chytrids e. Caliches
Brucellosis is also known as ________ fever.
a) relapsing b) undulant c) paroxysmal d) breakbone