FINAL OF FINALS Flashcards
perennials that create stiff structures above ground
Woody Plants
Types of woody plants
Trees
Shrubs
Vines
climb on other plants or on inanimate
structures like a fence or a wall
Vines
“backbone” for support
Wood
“skin” for protection
Bark
only part of the trunk that is alive
Cambial layer
transports water and mineral salts from roots to the other parts of the tree
Xylem
transports sucrose and amino acids between the leaves and other parts of the plant
Phloem
The old xylem becomes
wood
The old phloem becomes
the bark
an aggregate of untold number of small
units called cells.
Wood
It is an intercellular substance that separates wood cells
Middle lamella
In each cell, there is a wall enclosing a lumen which contains a vital plant substance called
Protoplasm
the living part of the cell, which comprises of different cellular organelles.
Protoplasm
It is a jelly-like, colorless, transparent, and viscous living substances present within the cell wall
Protoplasm
The substance present between the cell
membrane and the nucleus.
Cytoplasm
What does protoplasm contains?
cytoplasm and the nucleus.
What does cytoplasm contain?
cell organelles like Golgi bodies, endoplasmic reticulum, mitochondria, ribosomes, but no nucleus.
Jelly-like fluid containing water, proteins
and metabolic wastes.
Cytoplasm
What are the chemical composition of wood and their corresponding %?
Lignin 15-25
Hemicellulose 23-32
Cellulose 38-50
What is the purest form of cellulose known in nature?
Cotton
the polysaccharide fraction of the woody element comprising about 60-70%
Holocellulose
Man can digest starch (a polysaccharide) but not _______ which animals can
digest because of cellulose enzymes present in their guts or stomachs.
Cellulose
long chain of glucose units that polymerize into microfibrils.
Cellulose