Select your answer:
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Types of Doctors › ViewPulmonologist is a doctor who treats diseases of the__________.
A. heart
B. lungs
C. bones
D. muscles
Selective Breeding › View
Which of the following is an example of selective breeding?
A. populations of lizards that have a certain trait become more numerous after a change in climate
B. a population of insects develops resistance to a pesticide after farmers repeatedly use the same pesticide to kill the insects
C. a population of bacteria develops resistance to an antibiotic
D. farmers allow only sheep that produces the best wool to breed