Difference between revisions of "AY Honors/Trees - Advanced/Answer Key"

Revision as of 01:41, 30 September 2006

Template:Honor header

1. Have the Trees Honor.

Template:Ay prerequisite

2. Collect, identify, press, and mount leaves of 35 different species of trees.

Template:Ay leaf collection

3. Separately collect, press, mount, and label specimens that demonstrate the following terms:

a. Serrate: The margins of the leaf have forward-pointing teeth.
b. Doubly serrate: The serrations on the margin of the leaf have serrations on them.
c. Entire: The entire margin of the leaf is smooth. (sassafras, pawpaw)
d. Crenate: The margins of the leaf have rounded teeth.
e. Dentate: The margins of the leaf have symmetrical teeth.
f. Lobe: The edges of the leaf have large, smooth indentations that do not go all the way to the centerline. (oaks)
g. Incise
h. Whorled
i. Opposite: Leaves are paired on opposite sides of the stem. (sumacs, hickorys, walnut)
j. Alternate: Leaves are not across from one another on the stem, but are offset relative to one another.
k. Pinnately compound: A leaf consisting of multiple leaflets. (sumac, locust)
l. Triple compound (if possible): Like pinnately compund leaves except the leaflets have leaflets of their own. (devil's walking stick, mimosa).

4a. Describe the advantages in using the Latin or scientific names.

4b. Of what use are the two parts of a scientific name?

5. Name six families of trees in the angiosperm class and three families in the gymnosperm class.

6. Know and describe the function of leaves in the life of a tree.

7. Name the families of trees in your area which have opposite leaves.

8. Define the following terms:

a. Stipule
b. Petiole
c. Blade
d. Pitch
e. Heartwood
f. Sapwood
g. Springwood
h. Summerwood
i. Annual ring
j. Cambium
k. Xylem
l. Phloem

9. What families of trees have:

a. Thorns
b. Catkins
c. Winged seeds
d. Acorns
e. Pods
f. Capsules
h. Berries
g. Nuts

10. Identify ten deciduous trees by their “winter” characteristics, (features other than leaves) such as twig and bud, characteristic form, and growth habits.

References

@@ Line 6: / Line 6: @@
 ==3. Separately collect, press, mount, and label specimens that demonstrate the following terms:==
-;a. Serrate: The edges of the leaf have forward-pointing teeth.
+;a. Serrate: The margins of the leaf have forward-pointing teeth.
-;b. Doubly serrate: The serrations on the edge of the leaf have serrations on them.
+;b. Doubly serrate: The serrations on the margin of the leaf have serrations on them.
-;c. Entire: The entire edge of the leaf is smooth.
+;c. Entire: The entire margin of the leaf is smooth. (sassafras, pawpaw)
-;d. Crenate: The edges of the leaf have rounded teeth.
+;d. Crenate: The margins of the leaf have rounded teeth.
-;e. Dentate: The edges of the leaf have symmetrical teeth.
+;e. Dentate: The margins of the leaf have symmetrical teeth.
 ;f. Lobe: The edges of the leaf have large, smooth indentations that do not go all the way to the centerline.  (oaks)
 ;g. Incise:
 ;h. Whorled:
-;i. Opposite: Leaves are connected to the stems, at nearly the same point, but on oppostite sides. (sumacs, hickorys, walnut)
+;i. Opposite: Leaves are paired on opposite sides of the stem. (sumacs, hickorys, walnut)
-;j. Alternate:
+;j. Alternate: Leaves are not across from one another on the stem, but are offset relative to one another.
-;k. Pinnately compound:
+;k. Pinnately compound: A leaf consisting of multiple leaflets. (sumac, locust)
-;l. Triple compound (if possible):
+;l. Triple compound (if possible): Like pinnately compund leaves except the leaflets have leaflets of their own. (devil's walking stick, mimosa).
 [[Image:Leaf morphology no title.png|thumb|700px]]