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Tree Biology


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In the CODIT model, the LEAST effective barrier resists the spread of decay in the tree trunk
You can tell the yearly extension growth of a twig by
measuring between the terminal bud scars.
Specialized zones of intense cell division in plants are known as
Old phloem becomes incorporated in the
The closure of a would on the trunk of a tree is accomplished by
formation of new-tissues by the cambium.
The tree root that are PRIMARILY responsible for holding the tree erect are
large basal roots
Organic compounds more PRIMARILY away from the leaves and downwrd through the tree in the
Tap roots
initiate root distribution in the soil.
Every branch on a tree
has a single corresponding root connected to it.
Allelopathy occurs when
one plant chemically inhibits the growth of another plant.
Phototropism in a plant is
a directional response to light.
A group of cells which provides shoots and leaves is called the
apical meristem
Osmosis is the movement of
materials across a membrane from areas of high concentrations to areas of low concentrations
A true statement about roots is that
roots grow when and where the environment is favorable.
A FALSE statement about respiration is
only green plants are capable of respiration.
If the terminal bud is removed by pruning
growth from lateral buds will be stimulated.
New cells forming on the inside of the cambium become known as
It is a FALSE statement to say that bark
transpots water
In a cross section of a tree, the line of cells that extend across the annual rings are called
Tree trunks containing wood decay organisms
should be left alone
Most water and essential elements are absorbed into the tree through the
ends of the root and mycorrhizae
Stored food for growth and maintenance of a branch comes PRIMARILY from the
last few annual rings of sapwood in the branch.
The pard of the root that senses and reacts to the surrounding soil environment
The root caps and root meristems
The PRIMARY function of heartwood is
mechanical support.
Trees absorb nearly all water and minerals through
fine, fibrous roots.
The letters of 'CODIT' stand for
compartmentalization of decay in trees.
Seasonal changes within the bud are sensed by
In respiration, sugars utilized to generate energy for a tree produce water and
carbon dioxide.
A tree uses sugars and oxygen to release carbon dioxide and enerhy in a process known as
Gas exchange in the bark is through
When transpirational water losses exceed the tree's ability to take up water from the soil, the IMMEDIATE result is that
the stomated close
The negative pressure gradient created by transpiration allows
water to be pulled up through the tree

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