Show:
Phloem
Function
Transport
Plant organs
Xylem
100

Phloem moves sugars from _______ to __________

Source to sink

100
Composed of a layer of tightly packed cells that secrete a waxy cuticle to protect underlying plant tissues.
What is epidermal tissue.
100
The two cell types found in phloem.
What are sieve tube members and companion cells.
100
Absorbs and transports water and dissolved nutrients to stems and leaves, anchors the plant, and can store the products of photosynthesis (example is a carrot).
What is a root.
100

What direction does water move in the xylem?

Up, from high water potential to low water potential

200

What is the fluid called inside of the phloem elements?

Phloem sap

200
Parenchyma cells in leaves that function to perform photosynthesis.
What are mesophyll cells.
200
A type of xylem cell that connects to another via perforations to form tubes for the purpose of conducting water and dissolved nutrients upward. They are NOT found in gymnosperms.
What are vessel elements.
200

Where is the vascular system found in the stem of a dicot?

In vascular bundles around the outer ring of the plant

200
A type of plant cell that has a thick, lignified cell walls and is dead at maturity. It primarily functions in support and transport.
What is a sclerenchyma cell.
300

Describe source cells & sink cells

Source cells are where sugars (photosynthetic products) are produced (leaves/stems). Sink cells are nonphotosynthetic cells that store products (stems/roots)

300
Extensions of root epidermal cells that function to increase the available surface area for water and nutrient absorption.
What are root hairs.
300
The ability of water to travel as a column of water molecules upward from roots due to the negative pressure of transpiration water loss in the leaf.
What is the cohesion tension model.
300

Where is the vascular system found in the roots of dicots?

In the center

300

Which structural portion of the xylem can water not move through?

Lignified cell walls (lignin)

400

What causes the pressure that helps move phloem sap throughout the plant?

The movement of water into the phloem

400
The absorption of water and dissolved nutrients from the epidermis to the root endodermis through the porous space in the cell walls of adjacent plant cells.
What is apoplastic movement.
400
Movement of sugars from the: (1) sugar-rich endosperm of a seed to the tissues of the growing embryo, (2) leaves of a plant in summer to the roots and stems.
What is source to sink (pressure flow hypothesis)
400

In a transection of a plant, which vascular tissue is found more interior to the plant?

Xylem

400

Which part of the xylem can water move through?

Pits (unlignified cell walls)

500

Describe how phloem likely looks in a transection of a dicot in a microscope

Stained blue/green, many small vessels, exterior of the vascular bundle in comparison to the xylem

500
A thick waxy layer surrounding the root endodermis that regulates the passage of water and dissolved substances into the xylem tissue of the root.
What is the casparian strip
500
Made of fleshy parenchyma cells in the ovary of a plant that have stored sugars. They function in seed dispersal.
What is fruit.
500

Which organ has the lowest water potential in the plant?

Leaves

500

Describe how xylem might look in a transection of a dicot in a microscope

stained red, large vessels, interior of vascular bundle in comparison to the phloem, surrounded by endodermis (if in root)