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Which of the following is not a feature of echinoderms?

tube feet

radial symmetry

body segments

endoskeleton

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

Match the description of each organism to the appropriate category

Me the formula cacl2 represents the compound