Which term describes seed plants that produce pollen and ova?

The term that best describes seed plants that produce both pollen (the male gametophyte) and ova (the female gametophyte) is heterosporous. Heterosporous plants have two types of spores: microspores, which develop into male gametophytes, and megaspores, which develop into female gametophytes. This distinction in spore type is a key characteristic of seed plants such as gymnosperms and angiosperms, which rely on these different spores for sexual reproduction.

In contrast, the other terms refer to different reproductive strategies: homosporous plants produce only one type of spore that can develop into either male or female gametophytes, monoecious plants have both male and female reproductive structures on the same individual, and dioecious plants have separate male and female individuals. Thus, heterosporous accurately captures the concept of seed plants producing two distinct types of gametes for reproduction.