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Glossary of ABeka Science 6 Vocabulary Chap 2.5

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annual
a plant that lives for one year only
annual rings
the rings on the inside of a tree's trunk that indicate the age of the tree
biennial
a plant that lives for two years
bristlecone pine
a conifer with a long life span that endures great heights and rigid environments; some are believed by scientists to be the oldest living things on earth
broadleaf
a plant having broad, flat leaves; most are flowering, seed -producing plants
bud
a knobby structure at the tip of a stem that produces growth
California redwood
the tallest tree in the world, measuring 350 feet in height
cambium layer
the part of the tree where new bark and new wood are formed
deciduous
shedding leaves annually, usually in the fall
dendrologist
a scientist who studies trees
Dutch elm disease
a disease carried by two kinds of beetles that live within the bark of the American elm tree
elm
a group of tall broadleaf shade trees haveing tooth-edged leaves
giant sequoia
a 300-foot-tall conifer belonging to the redwood family; the largest of all trees
girdling
removing a ring of bark from the trunk of a tree
conifer
a cone-bearing tree
hardwood
a tree, usually a broadleaf, having very hard and durable wood that can be used for building purposes
David Livingstone
(1813-1873) A missionary explorer whose explorations of Africa opened the continent to European commerce and trade
maple
a group of broadleaf trees having toothed leaves with three to five lobes
oak
a group of broadleaf hardwood tres characterized by thick, wide-spreading branches and acorns
perennial
a plant that adds to its growth each year and grows for many years
sap
the fluid circulating in plants, especially woody plants, that carries water and food to the tissues
seed cone
the cone of a conifer that contains the ovules to be pollinated
sucrose
a type of sugar converted from starch in some plants
sugaring
the process of producing maple syrup and sugar
willow
a large family of trees and shrubs that usually grow near water; characterized by slender branches and narrow leaves; has soft wood that bends easily
pollen cones
the cones of a conifer that contain the pollen grains needed for pollination
needlelike leaf
a type of leaf found on evergreen trees; called needles
scaly leaves
a flat layer of very small leaves that covers a branchlet and stays green all year; called scales
evergreens
having green leaves all year
pine
the largest family of cone-bearing trees; including evergreens, spruces, firs, Douglas firs, hemlocks, and larches
cypress
a family of plants characterized by scaly leaves, such as cedars and junipers
knee
of trees, a humped root of a swamp tree, such as the baldcypress, that projects out of the water
frond
the leaf of a fern
dicots
a flowering plant having two cotyledons, petals in multiples of four or five, leaves that are ussually broad and flat, and taproots
monocots
a flowering plant characterized by seeds having one cotyledon, petals in mulitples of three, leaves with parallel veins, and fibrous roots

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