Each nucleotide in a strand of DNA is composed of a(n) ____________________, a(n) ____________________, and
a(n) ____________________. Fill in the blank(s) with the appropriate word(s).
ANSWER: sugar, base, phosphate group
base, sugar, phosphate group
sugar, phosphate group, base
phosphate group, sugar, base
base, phosphate group, sugar
phosphate group, base, sugar
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In bryophytes, the rhizoids
a. serve as attachment structures. b. obtain nutrients. c. obtain water. d. lure possible prey. e. are involved in reproduction.
Which of the following describes an example of how ocean acidification impacts aquatic communities?
A. Plankton cannot survive in overly acidic waters, so the shellfish that depend on their presence begin to die off as well, causing a chain reaction in the community. B. Shellfish over-calcify their shells, meaning those organisms that depend on them for food must find other food sources. C. Shellfish cannot reproduce in acidic waters, meaning their population sizes have decreased, negatively impacting others in the community that depend on their presence. D. Shellfish cannot calcify their shells, meaning they are at an increased risk of predation, negatively impacting others in the community that depend on their presence.
Explain the structure and function of the cell nucleus. Include the terms nuclear envelope, nucleoli, chromatin,
chromosomes, autosomes, and sex chromosomes. What will be an ideal response?
How would a large chromosomal inversion affect the expression of a gene if the gene is located between the two break points but no breaks occur within the gene?
A. The inversion would probably have no effect on gene expression. B. The gene would be transcribed in the 3' to 5' direction. C. The gene would be transcribed normally but the mRNA would be translated in the 3' to 5' direction. D. The gene would not be transcribed because it would be oriented in the wrong direction.