A febrile and pneumonic illness first named in 1976 by scientists at the Centers for Disease Control and Prevention (CDC) who were investigating an epidemic of pneumonia among Penn-sylvania State American Legion members attending a convention in Philadelphia is known as:
a. Philadelphia pneumonia.
b. legionnaires' disease.
c. tuberculosis.
d. rheumatic fever.
B
Legionella is the causative agent of legionnaires' disease, a febrile and pneumonic illness with numerous clinical presentations. Scientists at the CDC, who were investigating an epidemic of pneumonia among Pennsylvania State American Legion members attending a convention in Philadelphia, discovered Legionella in 1976 . Retrospective serologic evidence of Legionella in-fection has, however, been recognized as far back as 1947.
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The quaint northern resort town of Ejemplo Lago, known for its ice fishing and maple syrup production, has experienced an unusually hot summer, followed by a temperate fall. By December 1, the eponymous lake has still not frozen over; in fact, the temperature has not fallen below 4°C. Other than being forced to cancel the annual Fish and Flapjacks Charity Breakfast, what other effects can the residents of Ejemplo Lago expect?
a. a reduction in subsurface algal growth b. increase in spring lakeside plant growth c. an overall reduction in biodiversity d. a significant reduction of migratory birds
If red coat is homozygous dominant in horses
and white coat is homozygous recessive, in a cross between a homozygous dominant redcoated horse and a white-coated horse, what would the result be in the offspring?
a. all homozygous recessive b. all homozygous dominant c. half homozygous dominant and half homozygous recessive d. all heterozygous e. half heterozygous and half homozygous dominant
Molecular chaperones were originally referred to as:
A) heat shock proteins B) GroEL C) chaperonins D) Rubisco E) Hsp60
For given species or groups of species, some taxonomists and evolutionary biologists disagree on which common ancestry and evolutionary relationships may exist. They may hypothesize different common ancestors (nodes) or descendants (clades). Still, where fossil, or phenotype, or DNA sequence, or other factors make decisions difficult in preparing the cladogram, researchers commonly ensure their interpretation is the most
What will be an ideal response?