Manta rays, sting rays, and eagle rays are similar to lampreys in that they have cartilaginous skeletons. How are they different from lampreys?
A. They have closed circulatory systems.
B. They have jaws.
C. They have gills.
D. They have bony fin lobes.
Answer: B
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Urinary bladder, renal pelvis, uterers
A. Pseudostratified columnar B. Simple columnar C. Simple cuboidal D. Simple squamous E. Stratified squamous F. Transitional
A bacteriophage that can integrate its genome into the host chromosome and not cause lysis of the host cell is said to be ________.
A. temperate B. virulent C. avirulent D. moderate
Which of the following is not a component of the physical habitat in which organisms live?
A. water B. wind C. bacteria D. rocks
The major significance of Robert Koch's work is that
A) microorganisms are present in a diseased animal. B) diseases can be transmitted from one animal to another. C) microorganisms can be cultured. D) microorganisms cause disease. E) microorganisms are the result of disease.