We know that carbon dioxide levels were in the atmosphere millions of years ago through ____
a. radioisotope dating
b. measuring carbon dioxide levels in fossil fuel samples
c. measuring carbon isotope ratios in fossil fuel samples
d. measuring carbon dioxide levels in air pockets in ice cores
e. measuring carbon isotope ratios in air pockets in ice cores
ANSWER: d
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Proteomics is defined as the _____
A) linkage of each gene to a particular protein B) study of the full protein set encoded by a genome C) totality of the functional possibilities of a single protein D) study of how amino acids are ordered in a protein E) study of how a single gene activates many proteins
Why does the process of making biofuels from weeds and other plant matter require additional steps?
a. They contain a higher proportion of cellulose than corn, soy or sugarcane. b. They contain a lower proportion of cellulose than corn, soy or sugarcane. c. They contain a higher proportion of starch than corn, soy or sugarcane. d. They contain a higher proportion of ethanol than corn, soy or sugarcane. e. They contain a lower proportion of ethanol than corn, soy or sugarcane.
In Drosophila melanogaster, sex is determined by the ratio of the number of X chromosomes to the number of haploid sets of autosomes
Indicate whether the statement is true or false
When mitosis occurs without cytokinesis, which of the following is produced?
A) merozoites B) chromatids C) cysts D) macronuclei E) coenocytes