Which is the best definition of the term fossil? A: preserved remains or traces of a living thing
B: energy-rich resource formed from once-living organisms
C: type of rock formed by weathering and deposition
D: process that changes the surface of Earth

a. preserved remains or traces of a living thing

Explanation:

c & d already dont make any sense because we aren't talking about earth. b seems like it would be correct but fossils are preserved

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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bioteacher101