The first antibiotic was made because of properties discovered in a certain type of


A. spider.
B. mold.
C. blood.
D. herb.

The first antibiotic was made because of properties discovered in a certain type of:

B. mold.

The first antibiotic was made because of properties discovered in a certain type of B. mold.

To arrive at this answer, you can use several strategies. One way is to rely on prior knowledge or common knowledge. In this case, it is widely known that the first antibiotic, penicillin, was discovered by Alexander Fleming in the early 20th century. He noticed that a type of mold called Penicillium inhibited the growth of bacteria.

Another strategy is to conduct an internet search using keywords related to the question. You can search for "discovery of the first antibiotic" or "how was penicillin discovered." This will lead you to historical accounts and scientific studies that confirm the role of mold in the discovery of the first antibiotic.