Question

the strength of the active chemical in the majority of rooting hormones on the market ranges from ______.
a. 1.0 percent to 8.0 percent
b. 0.01 percent to 0.08 percent
c. 0.1 percent to 0.8 percent
d. 5.0 percent to 15.0 percent

Explanation:

Rooting hormones' active chemical strength is a topic in horticulture (a subfield of Biology, under Natural Science). Knowledge of typical rooting hormone concentrations: most commercial rooting hormones have active chemicals (like auxins) in the range of 0.1 percent to 0.8 percent. Option a is too high, b is too low, d is much too high. So the correct option is c.

Answer:

c. 0.1 percent to 0.8 percent