The genetic code is
A) a set of two base sequences coding for each amino acid.
B) used during the translation of DNA to mRNA.
C) read in sets of three bases called codons.
D) different in different organisms.
C
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Examine the flux diagrams in Figure 25.6 to address the following questions. What is the difference in the rate of carbon exchange (in gigatons per year of carbon) between photosynthesis and respiration in the marine environment?
What will be an ideal response?
Tirso de Molina is credited with launching the fictional character Don Juan in a play he wrote called El burlador de Sevilla y convidado de piedra (The Trickster of Seville). Many authors and playwrights, including W. A. Mozart, have written further accounts of this notorious seducer of women. Don Juan's "mating style" can best be characterized as _________ and ________.
a) pair bonding, polygynous b) polygamous, polygynous c) monogamous, polygamous d) polyandrous, monogamous e) polygamous, pair bonding
If the allele for inflated pea pods (I) is dominant to the allele for constricted pods (i), then the cross Ii xii is expected to produce
A) 3/4 with constricted and 1/4 with inflated pods. B) all peas with inflated pods. C) 3/4 with inflated and 1/4 with constricted pods. D) half with inflated and half with constricted pods. E) all peas with constricted pods.
In which two phases of mitosis does the nuclear membrane appear or disappear?
A. prophase and metaphase B. metaphase and anaphase C. prophase and anaphase D. prophase and telophase E. anaphase and telophase