You find an undescribed plant. It has small, free-living gametophytes and large, longer-lived sporophytes. You also observe that dispersal is carried out using spores. You thus conclude that your discovery is a .

(A) gymnosperm
(B) angiosperm
(C) non-vascular plant
(D) seed plant
(E) seedless vascular plant

(E) seedless vascular plant

Explanation:

Seedless vascular plants, compared to some other kinds of plants, reproduce and disperse through unicellular spores instead of seed. They possess vascular tissues but do not possess seed or flower.

The life cycle of the seedless vascular plant is characterized by alternation between the diploid sporophyte and haploid gametophyte. The haploid gametophyte is small, but still independent while the diploid sporophyte is is large and long- lived, it is the dominant phase of the life cycle.

Examples of seedless vascular plants are horsetails and ferns

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.