Syphilis and Lyme disease and strikingly similar in which of the following aspects?

A. Their modes of transmission are similar
B. Both diseases display three, distinct phases
C. Both causative agents can be cultured
D. The diseases show cross-immunity


Ans: B. Both diseases display three, distinct phases

Biology & Microbiology

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The three main forms of nitrogenous wastes found in animals are

A. ammonia, urea, and uric acid B. ammonia, urea, and uracil C. ammonia, urea, and amino acids D. uracil, urea, and uric acid E. amino acids, uracil, and uric acid

Biology & Microbiology

In garden peas, one pair of alleles controls the height of the plant, and a second pair of alleles controls flower color

The allele for tall (D) is dominant to the allele for dwarf (d), and the allele for purple (P) is dominant to the allele for white (p). A tall plant with purple flowers crossed with a tall plant with white flowers produces 3/8 tall purple, 1/8 tall white, 3/8 dwarf purple, and 1/8 dwarf white. What is the genotype of the parents? What will be an ideal response?

Biology & Microbiology

The experimental design in the accompanying figure was used to examine:


a. the relationship between genetic changes and metabolic enzymes.
b. the mutation rate of Neurospora.
c. resistance of Neurospora to genetic poisons.
d. toxicity of arginine metabolites.
e. growth of Neurospora in the presence of different antibiotics.

Biology & Microbiology

Fungi that grow as yeast at one temperature but will grow as mold at another temperature are called

A. saprobes. B. pseudohyphae. C. Fungi Imperfecti (Deuteromycota). D. dimorphic. E. spores.

Biology & Microbiology