Rain has a pH of approximately 6; which of the following terms correctly describes it?
A) alkaline
B) basic
C) acidic
D) neutral
E) polar
Answer: C) acidic
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The Ti plasmid has been genetically engineered to improve its utility as a cloning vector by all of the following EXCEPT
A. nonessential regions, including tumor-inducing genes, have been deleted. B. elements found in other vectors, such as selectable markers and multicloning sites have been added. C. genes responsible for resisting infection with B. thuringiensis have been added. D. genes required for the actual infection of the plant cell by the plasmid are retained.
The improvement of microscopy techniques in the late 1800s set the stage for the emergence of modern genetics because
A) it revealed new and unanticipated features of Mendel's pea plant varieties. B) it allowed biologists to study meiosis and mitosis, revealing the parallels between the behaviors of genes and chromosomes. C) it allowed scientists to see the DNA present within chromosomes. D) it led to the discovery of mitochondria. E) All of the above are true.
A unidirectional process where a specific compound released by one organism has a negative effect on another organism is called ________.
A. amensalism B. negative cooperation C. commensalism D. predation
What does MALDI stand for?
A) Matrix-Assisted Laser Desorption Ionization B) Maser-Assisted Ligand Desorption Ionization C) Maser-Assisted Laser Desorption Ionization D) Matrix-Assisted Ligand Desorption Ionization