It gets washed into the area as it rains.
Its because a wheelbarrow is 2 simple machines combined. its a lever and a wheel and axle. when you apply effort to the lever it will give upward force to the load making it easier to lift heavy objects.
Answer:
Homologous structures provide evidence for common ancestry analogous structures show that similar selective pressures can produce similar adaptations beneficial features Similarities and differences among biological molecules in the DNA sequence of genes can be used to determine species relatedness
They mix up the genes causing the organism to have more genetic variation