Please help, this determines how much work I do, allele chart.

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?