Symptoms of disease differ from signs of disease in that symptoms
A) are changes felt by the patient.
B) are changes observed by the physician.
C) are specific for a particular disease.
D) always occur as part of a syndrome.
E) None of the answers is correct.
A
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The semilunar valves of the mammalian heart _____
A) are the route by which blood flows from the atria to the ventricles B) are found only on the right side of the heart C) are the attachment sites where the pulmonary veins empty into the heart D) prevent backflow of blood in the aorta and pulmonary arteries E) are at the places where the anterior and posterior venae cavae empty into the heart
The four kingdoms included in the domain Eukarya are
A. Bacteria, Protista, Plantae, and Animalia. B. Archaea, Fungi, Plantae, and Animalia. C. Protista, Fungi, Plantae, and Animalia. D. Bacteria, Fungi, Archaea, and Animalia. E. Archaea, Bacteria, Protista, and Animalia.
In prokaryotes, transcription occurs in the _____
a. mitochondria b. cytoplasm c. ribosomes d. nucleus e. endoplasmic reticulum
The main criteria presently used for grouping viruses does NOT include
A) structure. B) chemical composition. C) similarities in genetic makeup. D) host infected.