Which of the following is most clearly a case of, Ask an Expert

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Which of the following is most clearly a case of density-dependent population regulation?

•     the summer drying of savanna grass for aninsect that feeds on grass sap
•     a dangerous new flu strain that istransmitted among humans by sneezing
•     the first hardfrost of fall for a population of annual morning gloryvines
•     the growth of shadetrees over a population of sun-loving shrubs in an abandonedfield
•     the occurrence of rainstorms for anopportunistic desert annual

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Category:- Biology
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