Tagres

.pdf

School

University of Hawaii *

*We aren’t endorsed by this school

Course

172L

Subject

Biology

Date

Apr 3, 2024

Type

pdf

Pages

6

Uploaded by DeaconBeeMaster89

Leaf Lab Assignment (20 points) Bold your answers. Save as PDF. Submit via Laulima by 11:55 pm day after lab. This is the property of UH Manoa BIO 172L Spring 2023 course. It may not be shared between students, between semesters, or on online sites. Part I: Secondary Growth in a icot Stem Take photos, label, and insert below with observations. Immature eudicot Stem (Week 4): -xylem, -phloem, -vascular cambium -pith Tilia Stem Slide (Week 5): -periderm, -phloem, -vascular cambium, -secondary xylem, -primary xylem, -pith Figure 1. Cross-section of typical eudicot stem shown at 400x magnification under a compound microscope. Labels indicate the phloem (A), xylem (B), vascular cambium (C), and pith (F). Figure 2. Cross-section Tilia americana is also known as American basswood shown at 100x magnification under a compound microscope. Labels indicate the pith (A), primary xylem (B), secondary xylem (C), vascular cambium (D), phloem (E), and periderm (F). Discussion: (bold your answers) 1. In complete sentences of your own words, talk about the xylem, phloem, and vascular cambium separately. Refer to Figure 2, and explain -the location in the stem
-the purpose of the structure -explain growth/changes from Figure 1 due to secondary growth The xylem is located more towards the epidermis while the phloem is closer to the center or under the xylem. The vascular cambium is in between the xylem and phloem. The purpose of the xylem is to transport water throughout the plant from the root. The phloem transports food such as carbohydrates. The vascular cambium increases the diameter of the plant. Growth and changes due to secondary growth allows the plant to widen and throw thicker rather than taller. It helps grow tissues to support the plant weight in the stem and roots. Part II: Leaf Anatomy /Characteristics (Photos of leaves must be taken in lab) Select one leaf to use to label anatomy and then observe its characteristics. Leaf #1 ( LABELED ): Photo must have labels on leaf anatomy - apex/tip -base -margin -mid-vein -petiole -blade Figure 3. Leaf of Genus codiaeum also known as croton plant shown and labeled. The labels indicate the tip (A), leaf base (B), margin (C), midrib (D), petiole (E), and mid-vein (F). Simple | compound Simple Blade shape Cuneate Margin Entire
Leaf attachment to stem/petiole Petiolate Venation Palmate Arrangement on stem? (opposite, alternating, whorled?) Alternating Possible plant identification? Genius codiaeum Leaf #2: Leaf photo does not need anatomy labeled Figure 4. Carissa macrocarpa leaf also known as natal plum shown above. Simple | compound Compound Blade shape Elliptic Margin Undulate Leaf attachment to stem/petiole Petiolate Venation Pinnate Arrangement on stem? (opposite, alternating, whorled?) Alternate Possible plant identification? Natal plum leaf Leaf Arrangement on Stem:
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help