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Chapt 8: Plants
Hutchison Exam Sp 07
26
Science
7th Grade
05/17/2007

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Term
Plants
Definition
Make their own food, cells enclosed by a cell wall, autotrophic or heterotrophic, multicellular
Term
Main parts of a plant cell:
Definition
cell wall, cell membrane, nucleus, vacuole, chlorophyll, chloroplast
Term
cuticle
Definition
protects cell with a waxy, waterproof layer
Term
vascular tissue
Definition
transports wastes, minerals, food through a series of tubelike structures
Term
zygote
Definition
fertilized egg
Term
Nonvascular plant
Definition
lack a well developed transportation system; cannot grow very large; live in moist places; example mosses
Term
vascular plant
Definition
contains true vascular tissue; can grow large, example pine tree
Term
sporophyte
Definition
plants that produce spores
Term
gametophyte
Definition
a sex cell produced by a plant
Term
Plants on land must:
Definition
obtain water and nutrients, retain water, transport material, support, and reproduce
Term
Plant fertilization
Definition
formation of a zygote from the joining of an egg and sperm cell
Term
Types of non vascular plants
Definition
mosses, hornwarts, liverwarts
Term
rhizoids
Definition
rootlike structures that anchor moss and absorb water and nutrients from the soil
Term
seedless vascular plant
Definition
ferns, club mosses and horsetails
Term
Seed plants
Definition
have vascular tissue; have pollen and seeds to reproduce
Term
germination
Definition
when the embryo begins to grow and pushes out of the seed
Term
seed dispersal
Definition
can occur from wind, water, and other animals
Term
fibrous root
Definition
many similarly organized roots that form a dense tangled mass
Term
tap root
Definition
harder to pull out of the ground-one main root with root fibers spreading out from the main root
Term
xylem
Definition
moves water from roots to other parts of food
Term
phloem
Definition
carries food to the roots from the leaves
Term
cambium
Definition
the cell layer that produces xylem and phloem cells
Term
sapwood
Definition
active xylem
Term
heartwood
Definition
is inactive xylem
Term
3 functions of a stem
Definition
carries substances, provides support, holds up the leaves
Term
cotyledon
Definition
the seed leaf that sometimes stores food
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