PLEASE HELP. And please explain 2. Which phylum of animals includes organisms that have soft bodies with pores and exhibit asymmetry?

Cnidaria

Echinodermata

Placozoa

Porifera

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

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

Explain the significance of meiosis in sexual reproduction