Instructions: Identify the Following

question 119

Essay

Instructions: Identify the following. Be as specific as possible, and include names, dates, and relevant facts as appropriate. Be sure to explain the significance of the person or term.
Indian Slave Trade

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Definitions:

Casparian Strip

A band of cell wall material found in the roots of plants, impregnated with suberin and lignin, that controls the flow of water and solutes into the xylem.

Vascular Cylinder

A central part of the root of plants where xylem and phloem tissues are located, responsible for the transport of water, nutrients, and other substances.

Companion Cells

Specialized cells in the phloem of plants that are closely associated with sieve tube elements and assist with the transport of photosynthetic products.

Pressure Flow Theory

A hypothesis explaining how sugars are moved from the leaves where they're produced to other parts of the plant through phloem.