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To maintain their species. Any species that lost reproductive ability would eventually die out.

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How do whales and dolphins reproduce?

Whales and dolphins reproduce through sexual reproduction. Mating occurs in water, with the male fertilizing the female's eggs internally. The gestation period varies, with whales typically carrying their young for 10-18 months and dolphins for around 11-17 months.


Which invertebrates asexually reproduce?

The small desert salamander reproduces asexually. It is an entire species of females. Each egg is an exact genetic copy of the mother salamander, which basically means that these small reptiles mastered the art of cloning. There are also bacteria, which all reproduce asexually. Some species of female sharks are reported to reproduce asexually too, however mammals have not mastered this skill yet. All known mammals are reported to reproduce sexually.


How do mammals reproduce their young?

Mammals reproduce by sexual reproduction, where a male mammal's sperm fertilizes a female mammal's egg. The fertilized egg then develops into an embryo inside the female's womb, where it is nourished through the placenta until birth. Mammals give birth to live young, as opposed to laying eggs like reptiles or birds.


Does kangaroos reproduce sexually or asexually?

Kangaroos are mammals, so like all mammals the produce sexually. But the actual ritual of intercourse has never been observed by humans. It has been speculated to involve bouncing and lots of latex.


What organisms reproduce internally?

Some examples of organisms that reproduce internally include mammals, birds, insects, and some reptiles. These organisms typically have specialized reproductive structures, such as reproductive organs or egg sacs, that allow for internal fertilization and development of offspring before birth or hatching.