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**Name:**

**Phylogenetic Tree of Trees**

Examine the phylogenetic tree of trees below and answer the questions.

1. Color the line that represents all ancestors of the Eastern white pine tree green (only the ancestral line not shared with other organisms).

2. Circle the last common ancestor of the Colorado blue spruce tree and Eastern white pine tree.

3. Put a box around the last common ancestor of the sugar maple tree and the dogwood tree.

4. Put a triangle around the last common ancestor of the red pine tree and the American holly bush.

5. Color the line that represents all ancestors of the Ponderosa pine tree red (including all shared ancestors).

6. Color the line that represents all ancestors of the American elm tree blue (including all shared ancestors).

7. Color the line that represents all ancestors of the Sabal palm tree purple (including all shared ancestors).

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**Tree List:**

- Sabal palm tree
- American holly bush
- Dogwood tree
- Sugar maple tree
- American elm tree
- Live oak tree
- White oak tree
- Bald cypress tree
- Sitka spruce tree
- Colorado blue spruce tree
- Eastern white pine tree
- Western white pine tree
- Ponderosa pine tree
- Red pine tree

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8. Using a yellow highlighter or colored pencil, circle the clade that includes all pine trees.

9. Using an orange highlighter or colored pencil, circle the clade that includes all gymnosperms.

10. Can you tell which pine tree is most closely related to the blue spruce tree? Why or why not?

11. It is incorrect to say that the Sitka spruce tree "evolved" from the bald cypress tree. Why? What can you say about these two trees?

(C) Bethany Lau 2016

Answer :

Final answer:

This answer outlines how to analyze a phylogenetic tree, indicating steps to color and circle specific trees and their relationships. Additionally, it explains why the Sitka spruce and bald cypress cannot be described in evolutionary terms as one evolving from the other. Understanding these trees' relationships clarifies their evolutionary history.


Explanation:

Understanding the Phylogenetic Tree

A phylogenetic tree illustrates the evolutionary relationships between various species, in this case, trees. To answer the specific questions posed:

  1. Ancestors of the Eastern white pine tree: Color only the ancestral line leading to the Eastern white pine that isn't shared with other organisms in green.
  2. Circle the ancestor of Colorado blue spruce and Eastern white pine tree: Locate the most recent shared ancestor of these two trees and circle it.
  3. Last common ancestor of sugar maple and dogwood tree: Box the last common ancestor shared by these tree species.
  4. Common ancestor of red pine and American holly bush: Box the last common ancestor of these two.
  5. All ancestors of Ponderosa pine: Color all shared and unique ancestral lines leading to the Ponderosa pine tree in red.
  6. All ancestors of American elm tree: Color these lines in blue.
  7. All ancestors of the Sabal palm tree: Color in purple.
  8. Clade of pine trees: Using yellow, circle the group that includes all species of pines.
  9. Clade of gymnosperms: Using orange, circle the clade inclusive of all gymnosperms.
  10. Relationship of blue spruce and pine trees: Identify the pine species that is most closely related to the Colorado blue spruce based on their proximity in the phylogenetic tree. The closest related pine could be identified by how recently they share a common ancestor.

Incorrect to say Sitka spruce evolved from bald cypress: The Sitka spruce and bald cypress are not directly evolved from one another; rather, they share a common ancestor. This means they branched out from lineage rather than one directly evolving from the other.


Learn more about Phylogenetic Tree here:

https://brainly.com/question/37208768


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