Study Set Content:
Stems of many cacti and some spurges are stout and fleshy. Adapted for storage of water and food
Water and Food storage stems
all thonrlike objects are
not modified stems
Example of thorns
Honey locust
Honey locust thorns may be more than (length)
3 decimeters
base of the petiole of most leaves and black locust
Spines
example of spine
Black locust
Originates from epidermis and neither is a thorn or spine
Prickles of raspberry
specialized stems of tiger lilies
Tiger lilies produce small aerial bulblets in the axils of their leaves
Have stems that are modified in various ways for their manner of growth
Climbing plants
rest on the top of other plants
Ramblers
example of tendrils
grape and Boston ivy, peas and cucumber
The use of woods of humans for fuel, shelter, weapons, and other purposes dates back to
antiquity
50% of the woods weight is?
water content
how many percent does seasoning reduce the moisture content of the wood
10%
special ovens
kilns
dry part of the wood is composed of
60-75% cellulose, 15-25% lignin
other stuff in woods that are present in small amounts
resins, gums, oils, dyes, tannins and starch
artificially uniting stems or parts of stems different but related varieties of plants have been practiced by humans for hundreds of years
Grafting
attachment of leaves
Alternate, opposite, whorled
leaves attached to the twig alternately or in spiral around the stem
Alternate
