1. The right answer is gymnosperm.
The term gymnosperm comes from the Greek gumnospermos meaning "bare seed". It refers to plants that are part of a subphylum of spermaphytes, seed plants. The hallmark of gymnosperm plants is that their ovum is bare (not enclosed in an ovary unlike angiosperms) and receives pollen directly. It is carried by a fertile leaf or scales more or less open.
2. The right answer is A.
Angiosperms are plants whose reproductive organs are condensed into a flower and whose fertilized seeds are enclosed in a fruit, unlike gymnosperms whose seed is bare. Thus, angiosperms are commonly called "flowering plants".
3. The right answer is C
A fern designates a filicophyte, a pteridophytic plant vascularized without flower or seed, consisting of a rhizome producing aerial stems whose large fronds, equivalent to the leaves, bear sporangia on their underside.
By definition, a fern is a cryptogam belonging to a group of about 12,000 species of vascular plants that reproduce by spores and have no seeds or flowers.
4. The right answer is seeds.
Spermaphytes (which include gymnosperms, chlamydosperms, and angiosperms) are the first seed plants to appear on the surface of the globe. They are distinguished from other plants (bryophytes and pteridophytes), among others, by aerial reproduction via pollen.
