A) Have J-shaped growth curves
B) Have type III survivorship curves
C) Are usually pioneer species
D) All of these
Correct Answer: A
Solution :
During short period of time, some population produce many offsprings which require little care. Therefore, these populations usually have a survivorship curve similar to type III. These tend to have J-shaped growth curves until some environmental change causes them to decline usually with in a short time. From an evolutionary point of view, such species have undergone selection to maximize their rate of natural increase and for this reason they are termed as r-trategies.
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