In 3-5 sentences, describe how Copernicus developed his model of the solar system. In your answer, include an explanation for why his model was, or was not, readily accepted at the time

Copernicus developed his model considering that the sun is a fixed point and planets rotate around the sun in the solar system. This is why he used the term "heliocentric" which means sun-centred. His model was not accepted by ancient philosophers because they said (1) if Earth is rotating, why we cannot feel the motion of Earth, and (2) if Earth is orbiting the sun, then the positions should be different when it is on opposite side of sun (parallax effect).

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

answer transpiration;