Many plants and animals can reproduce asexually
A. true
B. false
A
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The mechanism of DNA synthesis differs between the two new daughter strands during replication. This is due to the fact that
A. the DNA strands run antiparallel to each other and the DNA polymerase can only add nucleotides to the 3' end of the growing strand. B. both daughter strands can't extend toward the replication fork because there would not be room for two DNA polymerase enzymes. C. one RNA primer attaches to the 5' end of the parent strand and the other primer to the 3' end. D. both RNA primers attach to the 3' end of the template strands, which are at opposite ends from each other.
Four of the five events listed below are related by
a common phase of mitosis. Select the exception. a. chromosomes decondense b. spindle microtubules disappear c. nucleolus reappears d. chromosomes separate e. nuclear envelope re-forms
Molting in crustaceans is controlled by
a. ecdysone. b. the X organ. c. MIH. d. the Y organ. e. all of these.
Which of the following statements is TRUE concerning diphtheria?
A) No effective vaccine is available to prevent infection. B) A diffuse rash is the major sign of diphtheria. C) The signs and symptoms of the disease are directly caused by a bacterial toxin. D) The pseudomembrane is easily removed by surgery. E) A microscopic exam of bacterial samples is sufficient for conclusive diagnosis.