Which statement is false about prostaglandins?
a. They are local signaling molecules.
b. They promote blood flow to injured tissue.
c. They cause blood vessels to dilate.
d. They act as pheromones.
e. They alter chemical conditions in nearby tissues.
Answer: d
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When bone tissue first evolved in vertebrates, it was found within _____
A) an endoskeleton B) an exoskeleton C) a vertebra D) a skull E) a jaw
A person has a mutation in the gene for DNA uracil glycosylase. What is the most likely result of this mutation?
A. an increase in mutations B. the inability to produce mRNA that has uracil in it C. the inability to produce mRNA that has cytosine in it D. Nothing. This enzyme is only involved in silent mutations. E. None of the answer options is correct.
________ is the transfer of recombinant DNA into an individual's body in an attempt to correct a genetic defect
a. Gene therapy b. Polymerase chain reaction c. DNA sequencing d. Recombinant DNA e. In vitro fertilization
Island populations do NOT exhibit which of the
following when compared to the mainland populations from which they are derived? a. greater variability b. greater extinction rates c. fewer heterozygous loci d. large chance fluctuations in allele frequencies e. less genetic drift