Ans.
Gametophyte shows haploid, gamete-forming stage of plant's life cycle, while sporophyte shows diploid, spore-forming stage of plant's life cycle. In green algae, gametophytes and sporophytes are isomorphic (indistinguishable). In bryophytes, such as mosses, gametophyte shows dominant stage as it is most visible stage in their life-cycle. In vascular plants, such as ferns and seed plants, sporophytes show dominant stage.
Thus, 'seed plants show briefest gametophyte stage' and 'mosses show longest gametophyte stage.'
Exotic species do not have a niche in the ecosystem that they are in. Therefore they take up resources that native species rely on to survive. Exotic species also have no natural predators in that environment causing them to flourish and multiply quickly.
In a solar system, there is a sun that is in the middle and has planets orbiting around it. The same way, the nucleus is in the middle with electrons orbiting the nucleus. <span />
Thcfcxxfxfxfxfxfxrxesdtfghbvcxdfgvcxdfvcxdfgvcdfgv
I believe it’s B or D sorry I’m not 100% sure