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Nature · Guess the stat

How well do you know sexual reproduction in nature?

Guess the real numbers behind sexual reproduction in nature, see how everyone else guessed, and get the source.

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Insects, most of which reproduce sexually, make up roughly what share of all known animal species?

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Macro shot of two house flies mating on a green leaf in natural setting.
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about 100 million years old

The oldest known evidence of sexual reproduction in flowering plants comes from fossil flowers about how old?

These Cretaceous-period fossil flowers document some of the earliest known flowering-plant reproduction.

Source: Wikipedia, Sexual reproduction (2025) en.wikipedia.org

placentals

Living mammals fall into three groups that all use internal fertilization: monotremes, marsupials and which third group?

Placental mammals, which include humans, are the largest of the three mammal groups.

Source: Wikipedia, Sexual reproduction (2025) en.wikipedia.org

parthenogenesis

Some arthropod species can reproduce without mating at all, through a process called what?

In this process, females can produce offspring from unfertilized eggs, though most arthropods still rely on sexual reproduction.

Source: Wikipedia, Sexual reproduction (2025) en.wikipedia.org

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Each question asks you to guess a real number about sexual reproduction in nature. After you answer you see how everyone else guessed, then the real figure and where it comes from.

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