What hazardous material do fluorescent light bulbs contain, making it important to dispose of them properly?
A- aluminum
B- carbon
C- lead
D- uranium
E- mercury
E-Mercury
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What is the distance between these two genes?
You are mapping the location of two genes in Drosophila, listless l and blind b. (l+ b+ b+) and (l+ l b+ b) flies are normal, but (l l b b) flies don't move around very much and cannot detect the location of a light source. You perform a testcross with a doubly heterozygous fruit fly and get the following results: listless, sighted: 100 listless, blind: 400 normal activity:, sighted 400 normal activity:, blind 100 A. They are on different chromosomes. B. They are 10 map units apart. C. They are 20 map units apart. D. They are 40 map units apart. E. They are 80 map units apart.
Which of these traits best describes an adenovirus?
A. Naked and helical B. Naked and icosahedral C. Enveloped and helical D. Enveloped and icosahedral
James has been having trouble digesting lean steaks and other protein-rich foods, and these foods seem to stay in his stomach longer than usual. James is likely lacking the enzyme ________.
A. glucagon B. pepsin C. amylase D. bile E. lipase
An organism has a relatively large number of Hox genes in its genome. Which of the following is not true of this organism?
A) It evolved from evolutionary ancestors that had fewer Hox genes. B) It must have multiple paired appendages along the length of its body. C) It has the genetic potential to have a relatively complex anatomy. D) At least some of its Hox genes owe their existence to gene duplication events. E) Its Hox genes cooperated to produce the positional patterns of this organism as it developed.