What was the control in Redi’s experiment? a swan neck flask that prevented air from getting in uncovered meat that had contact with air a straight neck flask to allow air to get in meat covered by jars that didn’t have contact with air

i'd say that the moon rock is about 2.2 billion years old.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.