A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy?

What must be true for natural selection to heppen

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.