Acute gastroenteritis that occurs after an incubation period of two to three days and commonly affects children is probably caused by

A) Giardia.
B) rotavirus.
C) Salmonella.
D) Staphylococcus aureus.
E) Trichinella.


B

Biology & Microbiology

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What do the cell walls of plants and the extracellular matrix of animal cells have in common?

A) They are largely composed of phospholipids and glycoproteins. B) Their proteins are made by free cytoplasmic ribosomes. C) They form rigid structures that provide structural support for cells but limit their expansion. D) They limit the passage of small molecules. E) They have functional connections with the cytoskeleton inside the cell.

Biology & Microbiology

The role that an organism plays in its environment is called its

A. role. B. position. C. ecosystem. D. niche.

Biology & Microbiology

What non-skeletal adaptations allowed fishes to evolve into land dwellers?

What will be an ideal response?

Biology & Microbiology

Free nerve endings in the skin detect ____

a. steady touch b. steady pressure c. vibrations d. movements of individual hairs e. deep pressure

Biology & Microbiology