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Final Fall 2011
BIOL 1002
9
Biology
Undergraduate 2
12/08/2011

Additional Biology Flashcards

 


 

Cards

Term
What happens when cell divides
Definition
Daughter cells grow
Term
Daughter Cells
Definition
May differentiate depending on where they are located during development
Term
What happens as stem grows
Definition
As stem grows up it leaves behind the undifferentiated cells and those will mature into specific cell types
Term
Dermal Tissue (epidermis)
Definition
Single Cell layer that cover the plant
Absorption in the root system
Water retention in the shoot system, aided by a waxy cuticle
Term
Dermal Tissue (epidermis) cont.
Definition
Gives off a waxy layer called a cuticle to help prevent water loss
The root cells that make up the epidermis of the root do not contain that waxy material. The skin of the root is used to take up water. There is a waxy layer on the shoot to help prevent water loss.
Term
Vascular Tissue
Definition
It is kind of sort of the same as our arteries and veins.
Includes the xylem and the phloem
Term
Xylem (Vascular tissue)
Definition
transports water and dissolved minerals
represents a group of cells in which some of them are actually dead when they mature. The Xylem is found in specific places of the plant. And the cells die. Now waterway down from the tips of the root will be carried through these functionally dead cells of the Xylem, these are the vesicle element cells. And the Tracheid’s is the other cell types. These are used to move water and minerals up to the shoot. Sclerenchyma cells are also dead cells and they support all the tubes of the Xylem. They are holding up these pipes.
The xylem is unidirectional with the water
Term
Phloem (vascular tissue)
Definition
transports sugars dissolved in water
Phloems also have the sclerenchyma cells that hold them up. The cells are still alive when they function. They move sugars where they are required in the plant. The phloem consists of a sieve-tube element, which is budded up to the companion cell. This sieve-tube element cannot do everything it self so the companion element controls the sieve-tube element.
Sugar can move in either direction. So the phloem is bidirectional
Term
Vascular Tissue (cont.)
Definition
We find those types of tissues everywhere. All those pipes are contained in the dermis.
Water is taken up in the root and is moved up to the shoot of the plant
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