Ferns, whisk ferns, and horsetails are members of the ____ phylum, which has about 13,000 described living species
a. Hepatophyta
b. Monilophyta
c. Bryophyta
d. Lycophyta
e. Anthocerophyta
ANSWER: b
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Genetic sequences may be useful in predicting protein structure because
A. there is a high statistical frequency of specific amino acids within a given secondary structure B. the folding of the protein is based on how the mRNA folds. C. the physical and energetic properties of the DNA influence protein folding. D. knowing what specific codons are used for each amino acid in the protein can help predict its structure.
The clitoris of the female and a portion of the penis of the male are homologous structures. This means they have a similar
a. function. b. structure. c. developmental origin. d. origin and structure.
The hair cells of the inner ear begin to suffer damage when exposed to sounds louder than
a. 35?45 decibels. b. 45?55 decibels. c. 55?65 decibels. d. 65?75 decibels. e. 75?85 decibels.
Scientists developed a set of guidelines to address the safety of DNA technology. Which of the following is one of the adopted safety measures?
A) Microorganisms used in recombinant DNA experiments are genetically crippled to ensure that they cannot survive outside of the laboratory. B) Genetically modified organisms are not allowed to be part of our food supply. C) Transgenic plants are engineered so that the plant genes cannot hybridize. D) Experiments involving HIV or other potentially dangerous viruses have been banned.