Cystic fibrosis ___.

a. is a defect of a K+ channel
b. causes lungs to enlarge
c. reduces water and ion flow across membranes in many parts of the body
d. is caused by smoking


Answer: c. reduces water and ion flow across membranes in many parts of the body

Biology & Microbiology

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The form of natural selection that promotes behaviors that help close relatives is called ____

Fill in the blank with the appropriate word.

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Which of the following taxa are known to contain species that cultivate fungi for food? Check all that apply.

_____ leaf-cutting ants _____ humans _____ termites _____ beetles _____ nematodes

Biology & Microbiology

Natural sources of antioxidants do not include

a. vitamin C. b. vitamin E. c. orange vegetables. d. green leafy vegetables. e. O2

Biology & Microbiology

Only dendritic cells produce interleukins

Indicate whether the statement is true or false

Biology & Microbiology