The function of lymph nodes is to filter pathogens, microorganisms, and abnormal cells from the lymph before it returns to the cardiovascular system.

a. true
b. false


Answer: a. true

Biology & Microbiology

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Which progression represents the correct hierarchy of organization in the human body?

a. cells ? tissues ? organ systems ? organs b. cells ? tissues ? organs ? organ systems c. tissues ? cells ? organs ? organ systems d. tissues ? organs ? cells ? organ systems e. tissues ? cells ? organ systems ? organs

Biology & Microbiology

By one hypothesis, clay _____

a. facilitated assembly of early polypeptides b. was present at hydrothermal vents c. provided energy for early metabolism d. all of these

Biology & Microbiology

Where is glycogen stored in vertebrate animals?

A) Pancreas and blood B) Liver and muscles C) Brain and kidneys D) Teeth and bones E) Fat cells

Biology & Microbiology

Processes that supply ATP, reducing power, and precursor metabolites are collectively referred to as ________ reactions.

A. synthetic B. generating C. redox D. fueling

Biology & Microbiology