Norovirus is the leading cause of viral gastroenteritis in the United States

Indicate whether the statement is true or false


TRUE

Biology & Microbiology

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Which of the following is a male reproductive structure found in plants?

A. archegonia B. pistil C. pollen cone D. megaspore

Biology & Microbiology

Of all of the species of organisms that have ever existed on Earth, it is estimated that about _______ percent have gone extinct. 

A. 10 B. 50 C. 75 D. 99 a. true b. false

Biology & Microbiology

Organisms that are resident microbiota are best described as

A) microorganisms that remain with the person throughout life. B) any microorganisms that cause disease. C) organisms that remain in the body for a short time. D) microorganisms that may cause a disease under certain circumstances. E) microorganisms that never cause disease.

Biology & Microbiology

What is the route of water in the water vascular system of a starfish?

A. Water enters the ampullae and then goes to the tube feet and from thence to the radial canals, then the ring canal, and finally exits through the madreporite. B. Water enters the madreporite into the radial canals and from thence into the ring canal, then the ampullae and finally into the tube feet. C. Water enters through the madreporite into the ring canal and from thence into the radial canals to the ampullae and finally into the tube feet. D. Water enters the ring canal, then goes into the radial canals, and finally through the madreporite to the ampullae and tube feet. E. Water enters the madreporite into the ampullae and from thence into the ring canal, then the radial canals to the ampullae and finally into the tube feet.

Biology & Microbiology