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HHS Life Science
exam part 2B
39
Science
7th Grade
01/04/2007

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Term
CUTICLE
Definition
a waxy layer that coats most of the surfaces of plants to keep the plant from drying out
Term
NONVASCULAR PLANTS
Definition
plants that do not have specialized tissues to move water and nutrients through a plant
Term
VASCULAR PLANTS
Definition
plants that have tissues that move water and nutrients to differnet parts of the plant
Term
GYMNOSPERMS
Definition
nonflowering seed plants
Term
ANGIOSPERMS
Definition
seed plants that have flowers
Term
POLLEN
Definition
tiny structures of the plant in which sperm are formed
Term
RESIN
Definition
a sticky fluid produced by pine trees
Term
POLLINATION
Definition
the transfer of pollen from male reproductive structures to female reproductive structures
Term
XYLEM
Definition
vascular tissue that transports water and minerals from the roots to the stem and leaves
Term
PHLOEM
Definition
vascular tissue that transports food from the leaves to all parts of the plant
Term
EPIDERMIS
Definition
a layer of cells that cover the surface
Term
STOMATA
Definition
tiny openings in the epidermis that allow carbon dioxide to enter a leaf
Term
SEPALS
Definition
modified leaves that make up the outermost ring of flower parts and protect the flower as a bud
Term
PETALS
Definition
broad, flat, thin, leaflike parts of a flower
Term
STAMEN
Definition
the male reproductive structure of flowers
Term
FILAMENT
Definition
the thin stalk-like part of the stamen
Term
ANTHER
Definition
sac like structure on the stamen that produces pollen
Term
PISTIL
Definition
the female reproductive structure of a flower
Term
STIGMA
Definition
the top sticky part of a pistil that traps pollen
Term
STYLE
Definition
the long slender part of the pistil
Term
OVARY
Definition
the rounded base of the pistil that contains one or more ovules (eggs)
Term
What characteristics do most plants share?
Definition
Most plants make their own food, have a cuticle, have cells with cell walls, and reproduce using both spores and sex cells
Term
What are the two main groups of plants?
Definition
vascular and nonvascular
Term
What are the 3 groups of vascular plants?
Definition
1-seedless plants 2-gymnosperms 3-angiosperms
Term
What are some examples of nonvascular plantas?
Definition
mosses, liverworts, hornworts
Term
What are some examples of seedless vascular plants?
Definition
ferns, club mosses, and horsetails
Term
What are the three parts of a seed?
Definition
1-sporophyte -the young plant
2-stored food
3-seed coat
Term
What are gymnosperms used for?
Definition
building material, paper products, soap, turpentine, paint, ink, drugs, and landscaping
Term
What are the two kinds of angiosperms?
Definition
monocots and dicots
Term
What are the characteristics of monocots?
Definition
leaves have parallel veins, flower parts in 3's, one cotyledon (seed leaf), scattered bundles of vascular tissue
Term
What are some examples of monocots?
Definition
grasses, orchids, onions, lilies, palms, corn
Term
What are the characteristics of dicots?
Definition
leaves have branching veins, flower parts in 4's or 5's, two cotyledons (seed leaves), bundles of vascular tissue are in rings
Term
What are some examples of dicots?
Definition
roses, cactuses, sunflowers, peanuts, peas, beans
Term
What are some uses of angiosperms?
Definition
food, building materials, clothing, rope, medicines, perfunes, and rubber
Term
What are the 3 functions of roots?
Definition
1-supply plants with water and minerals
2-hold plants in soil
3-store surplus food
Term
What are the two types of root systems?
Definition
1-taproot-when there is one main large foot
2-fibrous-when there are several big roots spread out from the stem
Term
What are the four functions of stems?
Definition
1-connect roots to leaves and flowers
2-support plant body
3-some store materials
4-transport materials between roots and stems and leaves
Term
What are the two types of stems?
Definition
1-herbaceous-soft, thin, flexible stems
2-woody-hard, rigid stems
Term
What is the main functions of the leaves?
Definition
to make food for the plant
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