What is the function of macrophages during infection by a pathogen?

A. to kill the pathogen by directly damaging its cell membrane
B. to phagocytize the pathogen
C. to produce antibodies
D. all of the above


Answer: B. to phagocytize the pathogen

Biology & Microbiology

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Flowers may develop from a(n):

A. apical meristem. B. leaf meristem. C. branch meristem. D. lateral meristem.

Biology & Microbiology

What would be an easy way to determine if a skull is a mammal's skull? 

A. Look for air sacs in the skull. B. Examine the teeth. C. Look for the remains of the tympanum. D. Measure the brain case volume.

Biology & Microbiology

Which of the following is NOT an example of a prezygotic isolating mechanism?

a. An iris blooms at a different time of the year than a daffodil. b. A peacock puts on a different mating display than a sparrow. c. A snail with a shell coiling in one direction cannot mate with a snail whose shell curls the other way. d. A zebroid is sterile. e. One type of roundworm would reject the sperm from another species of roundworm.

Biology & Microbiology

Which category of plant second metabolites includes stimulants like caffeine, nicotine, and cocaine?

A. alkaloids B. phenolics C. tannins D. terpenes E. cyanogenic glycosides

Biology & Microbiology