Explanation
Heterospory is a condition in which an organism produces two types of spores, microspores and megaspores, which give rise to male and female gametophytes, respectively.
Out of the options provided, the organism that does not exhibit heterospory is Lycopodium, option A. Lycopodium is a type of clubmoss that exhibits homospory, meaning it produces only one type of spore, which gives rise to a bisexual gametophyte.
Marsilea, Azolla, and Selaginella, on the other hand, are all heterosporous. Marsilea is an aquatic fern that produces four-spored megasporangia and microsporangia. Azolla is a small aquatic fern that produces megaspores and microspores in specialized structures called sporocarps. Selaginella is a genus of spikemosses that produces microspores and megaspores in separate sporangia.
