Water is found throughout the earth. It is comprised of hydrogen and oxygen atoms. Water changes into different physical states without losing basic elemental structure. Using the law of the conservation of matter, explain how water changes phases and how water obeys this law. Write your evaluation in standard paragraph format with four or
five complete sentences.

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

Where in the cell are ribosomes made?

You are observing different types of cells in your science lab. one cell has many chloroplasts. what is the most likely function of this cell? a. energy production b. photosynthesis c. reproduction d. digestion