The only known marine lizard, the marine iguana, might be traditionally mostly black in color because they:
a. blend into terrestrial surfaces
b. absorb more heat energy.
c. attract mates.
d. warn other individuals.
b
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What are two types of defenses that plants have evolved in response to herbivory?
What will be an ideal response?
Which of the following statements best defines an altruistic act?
A. Benefits another, related individual at some cost to the performer B. Benefits another individual at some cost to the performer C. Imposes a cost on the performer and another individual D. Benefits the performer and another individual E. Imposes a cost on the performer without benefiting another individual
It has been recently determined that the gene for Duchenne muscular dystrophy (DMD) is more than 2000 kb (kilobases) in length; however, the mRNA produced by this gene is only about 14 kb long. What is a likely cause of this discrepancy?
A) The introns have been spliced out during mRNA processing. B) More amino acids are coded for by the DNA than by the mRNA. C) The DNA represents a double-stranded structure, whereas the RNA is single-stranded. D) When the mRNA is produced, it is highly folded and therefore less long. E) The exons have been spliced out during mRNA processing.
Much has been learned about the relationship between genes and gene products through the use of the mold Neurospora. What specific attributes make Neurospora a good organism for such studies?
What will be an ideal response?