Which statement is not true about leishmaniasis?
A) It is a slow infection that can persist for months to years.
B) It is preventable by a vaccine which is recommended for travelers to endemic areas.
C) Over twenty different Leishmania species may cause leishmaniasis.
D) It is transmitted by sand flies.
E) It is most prevalent in the tropics and subtropics.
Answer: B
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What is the best description of a nerve?
a. A bundle of sensory, motor, or both types of nerve fibers outside the central nervous system b. A single extension of a neuron c. The same as a neuron but found only within the central nervous system d. A collection of nerve cell bodies outside the central nervous system e. A set of sensory cells only found in the autonomic nervous system
Which of the following traits determines recombination frequency between two linked genes?
a. the relative sizes of the two chromosomes that each have one of the two genes b. the distance between the two genes on a single chromosome c. the distance between the two chromosomes that each have one of the two genes d. the overall size of the chromosome on which the genes are located
When two squash plants with disc-shaped fruit are crossed, depending on the genotype of the parents, disc, sphere, and long fruits may be seen in the offspring. This is an example of ________
A) epistasis B) heterogenous trait C) complementation D) dominant lethal E) two gene interaction with novel phenotypes
New roots can only form from existing root tissue
A. true B. false