A fern is an example of what type of plant?
a) seedless vascular
b) flowering plant
c) nonvascular
d) naked seed plant
Ans: a) seedless vascular
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What is a major difference between mitosis and meiosis I in a diploid organism?
A) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis I. B) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis II. C) DNA replication takes place prior to mitosis, but not before meiosis I. D) Only meiosis I results in daughter cells that contain identical genetic information.
Without data from the base composition studies of Chargaff, what might Watson and Crickâs modeling studies have erroneously concluded?
A. Bases could pair with themselves (e.g. A with A, C with C). B. Any purine could pair with any purine. C. Any pyrimidine could pair with any pyrimidine. D. Any purine could pair with any purine and any pyrimidine could pair with any pyrimidine. E. Any purine could pair with any pyrimidine.
Which of the following contributes to the invasiveness of Treponema pallidum?
A) hyaluronidase B) fimbriae C) lipooligosaccharide in the cell wall D) TSST E) IgA protease
The oxidizing agent in the enzyme superoxide dismutase is
A) superoxide anion (?O2-). B) H2O2. C) Copper. D) O2. E) All of the above.