The amount of people having baby’s or the amount of people dying
Answer:
In a chemical reaction the total mass of all the substances taking part in the reaction remains the same. Also, the number of atoms in a reaction remains the same. Mass cannot be created or destroyed in a chemical reaction
You didn't give the options for "which" but I assume your multiple choice questions will all be environmental factors that can cause mutations. To pass on to offspring, any mutation in the gametes or a chromosome may cause a mutation in the offspring.
Yes it is in consideration all catalysts are of biological origin because biology is just a large term for a certain type of science.