You recently discovered a new element, and find that this particular element has one electron in its outer energy level. What would you expect will happen to an atom of this element if placed in water?
A. It will gain an electron forming a negative ion.
B. It will lose an electron forming a negative ion.
C. It will gain an electron forming a positive ion.
D. It will lose an electron forming a positive ion.
Answer: D
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Soon after the island of Hawaii rose above the sea surface (somewhat less than one million years ago), the evolution of life on this new island should have been most strongly influenced by _____
A) a genetic bottleneck B) sexual selection C) habitat differentiation D) the founder effect
In an experiment, you have created a microbial strain in which you have deleted a single gene; to evaluate the transcriptome and the proteome, you
A. run two-dimensional gels. B. perform DNA sequencing. C. run microarray analysis. D. run microarray analysis and two-dimensional gels.
What is the role of heterozygote advantage in maintaining high frequencies of mutant alleles in
populations? Indicate whether the statement is true or false.
Huntington Disease is inherited in humans as an autosomal dominant gene. Affected individuals show progressive brain deterioration from cell death in the cerebral cortex. Onset of the disease usually occurs between ages 30 and 50
Give two possible reasons for the observed variation in the age of onset of this disease.