How is mathematics used to study space? it is used to determine distances in space it is used to determine the size of objects in space it is used to determine the mass of objects in space all of these

What is the chance of two parents with blood types ab and o producing an offspring with blood type o a.0% b.25% c.75% d.50%

About __ of the mass of the cell is water

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled