Explain the environmental benefits of recycling paper products.

What feature of cell theory is best demonstrated in the image

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

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm