What is H₂O - H₂+ boz

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

Which group of algae is characterized by unicellular organisms and includes some members that would be better classified as zooflagellates? euglenophytes red algae sporozoans green algae

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?