Final answer:
The platypus, a mammal studied in Biology, is unique in that it lays eggs and has venom-producing glands.
Step-by-step explanation:
The subject of this question is Biology, as it pertains to the study of living organisms. Specifically, it discusses the platypus, a unique mammal that lays eggs and has venom-producing glands.
The platypus belongs to a group of mammals called monotremes, which are distinguished by their egg-laying reproductive strategy. It is one of the few mammals that produce venom, although its venom is not generally lethal to humans.