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
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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.
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
Natural sources of antioxidants do not include
a. vitamin C. b. vitamin E. c. orange vegetables. d. green leafy vegetables. e. O2
Only dendritic cells produce interleukins
Indicate whether the statement is true or false