John was studying about the history of Sahara desert. He was amazed to find that ten thousand years ago there were plenty of rainfall in that region. He labeled that era as era A. Then he found that rainfall deceased in the region about eight thousand years ago. He labeled that era as era B. He was wondering how that change in rainfall might have helped emerge the Egyptian civilization. Would era A see less or more rocks with chemical reactions than era B?
Ans: more

Danny owned two parcels of land. parcel A had a soil with high salinity levels, while parcel B had a rich and healthy soil. Which parcel had fewer plants which presented altered enzyme functions?
Ans: parcel A

Two entomologists liked studying all types of insects and arthropods. Bill was focused on insects that never eat. His buddy Paul was more focused on the feeding habits of other insects that eat a lot of food. Which friend studied more locusts?
Ans: Paul

Two sisters went in for a medical examination. Mary had normal blood calcium level, but her sister Ann sadly found out that she has a condition named hypercalcaemia. Ann started a new treatment right away. Which sister didn't have excess calcium salts being deposited in the kidneys?
Ans: Mary