Why might red blood cells be important to the normal function of the organism's body

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

In general, are there any major differences that you can see? explain

How dose plate tectonics effect climate