An enzyme select one: a. can bind to nearly any molecule b. is a inorganic catalyst c. is an organic catalyst d. is a source of energy for endergonic reactions e. increases the ea of a reaction

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.

Archaebacteria use for movement. celia flagella pili cell walls

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?