Land ecosystems lose nitrogen to aquatic systems through ____
a. decomposition
b. ammonification
c. soil leaching
d. bacterial fixation
e. denitrification
ANSWER: c
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What mechanism is used by a bacterial cell to fit its DNA into the nucleoid region?
A. the formation of loop domains B. supercoiling by topoisomerases C. tight wrapping around histones to form nucleosomes D. the formation of loop domains and supercoiling by topoisomerases E. the formation of loop domains, supercoiling by topoisomerases, and tight wrapping around histones to form nucleosomes
If individuals 4 and 7 have a child, what is the probability that the child will exhibit the trait?
Above is a pedigree for a common human trait (not a disease) controlled by a single gene. Shaded symbols are for individuals exhibiting the trait.
A) 1/4
B) 1/2
C) 1/6
D) 2/3
E) 0
Which of the following is a characteristic shared by DNA and RNA polymerases?
A) efficiency of proofreading B) type of nucleotides used C) direction of polymerization D) speed E) dependence on helicase
Although they do not possess the nervous and muscular systems animals do, plants are able to physically respond to their environments. Evaluate and support this statement
What will be an ideal response?