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12y ago
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9y ago

When a porpoise is born, it is a calf. It nurses for a little less than a year, and is then considered an adult. The life expectancy of a porpoise is uncertain, but thought to be less than 20 years.

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9y ago

The porcupine is a mammal. The life cycle of most mammals is: an adult produces an egg, which is fertilized into an embryo; the embryo grows until the mammal can give birth, and then continues growing as an immature organism until it reaches puberty and begins producing eggs or sperm to be fertilized or to fertilize, respectively.

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Q: What is the life cycle of a porcupine?
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