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33. The structure that matures into the seed is called an ovule.

24. A mature seed consists of the seed coat, nutritive tissue, and 

22. Vascular plants include both seed-producing and seedless groups. List two  significant adaptive benefits for seed-producing plants?

35. What is a key function of the endosperm in the seed?

40. In general, how do flowers pollinated by bees differ from flowers pollinated by hummingbirds?

19. The first plants to produce seeds looked very much like

33. The structure that matures into the seed is called an ovule.

4. The pores and cavities of the thalli of liverworts are filled with air.

5. The mother cells within the sporangia on the sporophyte plant undergo ________ to produce spores

3. The one-celled anchoring structures present on the lower surface of a thalloid liverwort are