PLEASE HELP IM DOING A TEST RN AND THIS IS MY LAST QUESTION! If an unknown piece of food produced 25 Cal of heat in a calorimetry test and lost 5 g of mass after burning, how many Calories are there in 1 gram of that food? *

How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?

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.

Using meiosis, the sporophyte produces spores that are .