A polar covalent bond results when:
A) one of the atoms sharing electrons is more electronegative than the other atom.
B) two atoms share electrons equally.
C) two atoms sharing electrons are equally electronegative.
D) two atoms of the same element are sharing electrons.
Answer: C
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Which of the following statements about agricultural fertilizers is false?
A. Global nitrate and phosphate resources are in decline. B. Large amounts of fertilizers are necessary to maintain high crop yields year after year. C. Nitrate and phosphate runoff cause eutrophication in different communities. D. Phosphates are obtained exclusively through mining. E. If the human production of fixed nitrogen stopped, the amount of fixed nitrogen added to the biosphere each year would only be about half of what it is now.
Data gained from the Human Microbiome Project could help scientists understand _____
a. microbial haplotypes b. where microbes are concentrated in the human body c. the function of probiotics d. why antibiotics disrupt the microbiome e. how changes in the microbiome can lead to disease
One way to examine the assembly and organization of the actin cytoskeleton in animals is to examine
____.
a. animal cells in culture b. extracellular actin movement in bacterial pathogens c. intracellular actin movement in bacterial pathogens d. extracellular actin movement in viral pathogens e. intracellular actin movement in viral pathogens
What is codon bias? If synonymous substitutions give the same amino acid, why should there be a bias in which codons encode that amino acid?
What will be an ideal response?