A three-base sequence (loop) in tRNA that is complementary to a three-base sequence in mRNA is
a codon
an anticodon
a promoter
a terminator
an amino acid attachment site
an anticodon
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The poison warfarin was once the most popular form of rat control. Eventually warfarin-resistant rat populations emerged so people stopped using warfarin for rat control. Since then, the frequency of warfarin-resistant rats has once again declined. What may be the reason for this?
What will be an ideal response?
Why is back pain so common in humans? What will be an ideal response?
Which statement describes the expected population growth in the next 50 years?
A) The population growth will be relatively equal throughout the world. B) The greatest population growth is likely to occur in the more industrialized countries, including the United States and Europe. C) Most countries worldwide will achieve zero population growth in the next 10 years. D) The greatest population growth is likely to occur in the least industrialized countries. E) There will be a net decline of population, with the United States and other industrialized countries contributing most to the population decline.
Mitosis creates ________________, while meiosis creates _____________________.
A) haploid gametes; diploid gametes B) diploid somates; diploid gametes C) haploid somates; haploid gametes D) diploid somates; haploid gametes