The Periodic Table can predict the properties of new elements, because it organizes the elements according to their atomic numbers.
I hope this helps
2019 years have humans been on earth
1. It requires two parents.
<span>2. It takes time and energy.
</span><span>3. It can prevent favourable genes from being passed to offspring.
</span><span>4. It produces fewer offspring than asexual reproduction.
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You didn't give options so I couldn't properly answer your question.
However, hope this helps xox :)