Answer:
Cost: competition for mates, competition for resources
Benefit: better protection from predators (ex. a fish in a school of fish has greater chances of not getting eaten because of the large number of other fish)
It seems to me that the graph indicates that the number of species that have become extinct <span> has increased with increasing human population. I consider the first option as a correct one because lines represented on the graph both go upwards through the same period of time and also they coincide which means they both increased.
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Cuanto pesa y mide el hueso frontal-> How much does the frontal bone weigh and measure?
This depends on whose frontal bone you are weighing and measuring. Please include a picture for reference next time if you want specific answers.
They are rare, but can significantly increase genetic diversity when reproductive rates are high<span>
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