Rock concerts and shotgun blasts can produce sounds at a level of
a. 100 decibels.
b. 130 decibels.
c. 200 decibels.
d. 250 decibels.
e. 300 decibels.
B
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Which of the following statements about water is correct?
A. Water is the most abundant molecule in living cells. B. Water is a polar molecule. C. Water has good solvent properties. D. Water can drive biological processes such as the formation of cell membranes. E. All of these statements about water are correct.
An R loop experiment was performed on two different mRNA's. The first showed one R loop, while the second showed two R loops separated by a region of double-stranded DNA. What is the composition of these two mRNA's?
A. The first contains no introns and the second two introns B. The first contains no introns and the second one intron C. The first contains one intron and the second two introns D. The first contains two introns and the second one intron
Which substance is defective in Marfan syndrome?
a. sphingolipids b. albumin c. fibrillin d. amyloid e. LDLs
Our agricultural populations are maintained artificially. This means that
A. mutation must be stopped. B. random mating is prohibited. C. gene frequencies are allowed to change. D. asexual reproduction must be prohibited.