5. While snowshoeing through the winter woods, you stop to look at a tree branch

Question

5. While snowshoeing through the winter woods, you stop to look at a tree branch pictured at the right. Specifically, what (0.5x). 6. Distinguish between pollination and fertilization Are antheridia present in conifers? Are archegonia presenti Suppose you saw the seedling pictured at the right 7. 8. walking in the woods a. To which gymnosperm phyhum does the plant belong? b. Identify structures A and B (0.5×). 16.2 Phylicm Cycadophyta: Cycads 9. On spring break, you are strolling through a tropical garden in Florida and encounter the plant pictured at the right. Would the xylem of this plant contain tracheids, vessels, or both? (0.01x). 16.3 Phylum Ginkgophyta: Ginkgo 10. A friend of yours picks up a branch like the one pic- tured at the right. Knowing that you have taken a bi- ology course and studied plants, she asks you what the plant is. Identify this branch, giving your friend the full scientific name for the plant. (0.75x) 306 ExERCISE 16

Explanation / Answer

1) It is a pine cone (coniefer cone). They contain the reproductive structures of a conifer. The woody cone is the female cone containing ovules that produces seeds upon fertilization by pollen. The male cones are herbaceous, that produces pollen. Only female cones differ in structure among species. The cone is made up of woody plates known as scales.

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