What makes sperm continuously

Which of the following statements is not true? • a. covalent compounds have low melting and boiling points. • ob. covalent bonds between atoms of a compound are relatively weak compared to bonds between molecules. • c. covalent bonds occur between nonmetals. • d. covalent compounds are often gases or liquids.

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?