Answer:
E = The activation energy barrier for this reaction can not easily be surmounted.
Explanation:
Starch:
Starch is a polymeric carbohydrate consist of various glucose units join together through glycosidic bonds.
Reason why it is not dissolve at room temperature:
When starch is added into water it form granules with cold water and can be soluble by heating.
At a room temperature the starch does not readily decompose to from the solution by decomposing into simple sugar because the activation energy barrier for this reaction can not easily be surmounted at a room temperature.
Smallpox- began Africa, spread through trade and human interaction.
Chestnut blight-isn't this a chestnut found in America?
The answer u r looking for is- D, Nuclear Envelope. Hope I’ve helped ;)
I think it’s increase in gene flow
