In the some areas of Africa, droughts have caused clean drinking water sources to dry up. How would technology most likely be useful for this
region?
A. Development of transportation
B. Caring for an aged population
C. Purifying dirty water
D. Development of high-speed communication

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

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