Penicillium is a _____.

The correct answer is Option (3) → Fungi

Penicillium is a fungus, a blue-green mould that grows on stale bread and fruit. Like other fungi it has no chlorophyll, its body is made of thread-like hyphae, and it feeds on dead organic matter. In 1928 Alexander Fleming found that a Penicillium mould killed bacteria, which led to the first antibiotic, penicillin.