Why is it safer to use solar energy than chemical energy?

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?

Which of the following is not a benefit of genetically modified foods? a.pest-resistant crops b.herbicide-resistant crops c.plants that do not require water?

The law of states that traits are passed from parents to offspring independently of one another.. true or false