Carbon-12 is the most
common isotope of carbon.
it has 6 protons, 6 neutrons,
and 6 electrons. of its 6
electrons, 4 are valence
electrons. how many
covalent bonds can a carbon
atom form?

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature about 37 degrees celsius (98.6 degrees f)? describe what might happened the temperature decreased by 10 degrees celsius.

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

How do ratio scale and diagrammatic scale work