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HHS Life Science
chapter 12 plants
165
Science
7th Grade
12/12/2006

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Term
What characteristics do most plants share?
Definition
most plants make their own food, have cuticle, have cells with cell walls, and reproduce using both spores and sex cells.
Term
What is a CUTICLE?
Definition
a waxy layer that coats most of the surfaces of plants to keep the plant from drying out
Term
What are the two stages in the life cycle of a plant?
Definition
1-sporophyte-when the plant produces spores 2-gametophyte-when the plant produces sex cells
Term
What are SPORES?
Definition
small reproductive cells protected by a thick cell wall
Term
What are the two main groups of plants?
Definition
vascular and nonvascular
Term
What are NONVASCULAR PLANTS?
Definition
plants that DO NOT HAVE specialized tissues to move water and nutrients through a plant
Term
How do materials move in nonvascular plants?
Definition
nonvascular plants rely on diffusion to move materials
Term
What are VASCULAR PLANTS?
Definition
plants that HAVE tissues that move water and nutrients to different parts of the plant
Term
What are the 3 groups of vascular plants?
Definition
1-seedless 2-gymnosperms 3-angiosperm
Term
What are GYMNOSPERMS?
Definition
nonflowering seed plants
Term
What are ANGIOSPERMS?
Definition
seed plants that have flowers
Term
What are some examples of nonvascular plants?
Definition
mosses, liverworts, hornworts
Term
Where do most nonvascular plants live?
Definition
in damp places
Term
What is a RHIZOID?
Definition
a rootlike structure that holds nonvascular plants in place, that also help nonvascular plants get water and nutrients
Term
Why are nonvascular plants important?
Definition
they form a thin layer of soil for new plants to grow, they prevent soil erosion, they can be used for food for some organisms, and they can be used for nesting material
Term
What are some examples of seedless vascular plants?
Definition
ferns, club mosses, and horsetails
Term
What is a RHIZOME?
Definition
an underground stem from which new leaves and roots grow
Term
How are seedless vascular plants important?
Definition
help from soil, prevent soil erosion, houseplants, food, shampoo, skin-care products, and fuel
Term
What is POLLEN?
Definition
tiny structures of the plant in which sperm are formed
Term
What are the most common plants on earth today?
Definition
seed plants
Term
What are the three parts of a seed?
Definition
1-sporophyte-the young plant 2-stored food 3-seed coat
Term
What are two advantages seed plants have over seedless plants?
Definition
1-seeds have stored food to help the new plant grow 2-seeds can be spread by animals which is more efficient than the wind
Term
Where are gymnospern seeds usually found?
Definition
in a cone
Term
What are the four groups of the gymnosperms?
Definition
conifers, cycads, gnetophytes, ginkgoes
Term
What are gymnosperms used for?
Definition
building material, paper products, soap, turpentine, paint, ink, drugs, and landscaping
Term
What is RESIN?
Definition
a sticky fluid produced by pine trees
Term
What is POLLINATION?
Definition
the transfer of pollen from male reproductive structures to famale reproductive structures
Term
Why do angiosperms have flowers and fruits?
Definition
flowers help them reproduce and fruits surround and protect the seeds
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 branchingveins, flower parets in 4's or 5's, two cotyledons (seed leaves), bundles of vascular tissue are in rings
Term
What are some uses of angiosperms?
Definition
food, building materials, clothing, rope, medicines, perfunes, and rubber
Term
What are the two types of vascular tissue?
Definition
xylem anf phloem
Term
What is XYLEM?
Definition
vascular tissue that transports water and minerals from the roots tothe stem and leaves
Term
What is PHLOEM?
Definition
vascular tissue that transports food from the leaves to all parts of the plant
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 is EPIDERMIS?
Definition
a layer of cells that cover the surface
Term
What is a ROOT CAP?
Definition
a group of cells that protects the tip of the root
Term
What are the two types of root systems?
Definition
1-taproot - when there is one main large root 2-fibrous - when there are several big roots spread out from the stem
Term
What are the four fuctions 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 fuction of the leaves?
Definition
to make food for the plant
Term
What are STOMATA?
Definition
tiny openings in the epidermis that allow carbon dioxide to enter a leaf
Term
How does a flower influence pollination?
Definition
bright colors, fragrance and nectar attract animals to pollinate flowers; flowers that lack those rely on the wind for pollination
Term
What are SEPALS?
Definition
modified leaves that make up the outermost ring of flower parts and protect the flower as a bud
Term
What are PETALS?
Definition
broad, flat, thin, leaf like parts of a flower
Term
What is the STAMEN?
Definition
the male reproductive structure of flowers
Term
What is the FILAMENT?
Definition
thethin stalk-like part of the stamen
Term
What is the ANTHER?
Definition
the saclike structure on the stamen that produces pollen
Term
What is the PISTIL?
Definition
the female reproductive structure of a flower
Term
What is the STIGMA?
Definition
the top sticky part of a pistil that traps pollen
Term
What is the STYLE?
Definition
the long slender part of the pistil
Term
What is the OVARY?
Definition
the rounded base of the pistil that contains one or more ovules (eggs)
Term
What flower part forms a fruit?
Definition
the ovary forms a fruit once the egg is fertilized
Term
What part forms a seed?
Definition
the fertilized ovule
Term
What do humans use flowers for?
Definition
floral arrangements, food, tea, spices, perfumes, lotions, and shampoos
Term
How are gymnosperms and angiosperms different?
Definition
gymnosperms do NOT have flowers or fruit. Angiosperms HAVE flowers or fruit that protect the seed.
Term
COTYLEDONS
Definition
seed leaves of a young plant
Term
FERTILIAZTION
Definition
joining of spermand egg
Term
SEED COAT
Definition
structure that surrounds and protects the young plant
Term
SPOROPHYTE
Definition
the young plant within a seed
Term
Often the purpose of the cotyledon is
Definition
food storage
Term
Seed plants that so not have flowers or fruit are called
Definition
gymnosperms
Term
Gymnosperm seeds are usually protecte by
Definition
cones
Term
the most economically important gymnosperms are the
Definition
conifers
Term
Three things that conifers are used for are
Definition
building materials, cancer drugs, and gardens and parks.
Term
Most are evergreens
Definition
conifers
Term
Group of gymnosperms that are shrubs that grow in dry areas
Definition
gnetophytes
Term
Group of gymnosperms with only one living species
Definition
ginkgoes
Term
Gynmosperms that grow in the Tropics
Definition
cycads
Term
During the pine life cycle, sex cells are produced in the
Definition
cones
Term
The male _________ of gymnosperms are found in pollen.
Definition
gametophytes
Term
Pollen is carried from the male cone to the female cone by
Definition
wind
Term
Some pine cones release seeds only during
Definition
special circumstances
Term
The transfer of pollen from the male reproductive structures to the female reproductive structures of seed plants is called
Definition
pollination
Term
About how many species of angiosperms can be found today?
Definition
at least 235,000
Term
Monocot or Dicot
plant that has one cotyledon (seed leaf)
Definition
Monocot
Term
Monocot or Dicot
vascular tissue in bundles that are scattered
Definition
Monocot
Term
Monocot or Dicot
plant that has leaves with branching veins
Definition
Dicot
Term
Monocot or Dicot
flower parts in threes
Definition
Monocot
Term
Monocot or Dicot
vascular tissue in a ring
Definition
Dicot
Term
Monocot or Dicot
flower parts in fours or fives
Definition
Dicot
Term
What is the name of the green pigment that captures energy from the sun?
Definition
chlorophyll
Term
Plants use energy from sunlight to make food from carbon dioxide and water in a process called
Definition
photosynthesis
Term
What does the cuticle do?
Definition
it keeps plants from drying out
Term
rigid structure that surrounds a plant cell
Definition
cell wall
Term
structure that contains chlorophyll
Definition
chloroplast
Term
structure that stores water
Definition
vacuole
Term
a substance that forms a hard material in cell walls
Definition
carbohydrates
Term
structure that lies beneath the cell wall
Definition
cell membrane
Term
Plants make spores in the ______ stage.
Definition
sporophyte
Term
When the spores of some plants grow, the new plants are called ______
Definition
gametophytes
Term
The fertilized egg of a gametophyte grows into a(n) ________
Definition
'
Term
an example of a nonvascular plant
Definition
liverwort
Term
plants without specialized conduction tissue
Definition
nonvascular plants
Term
an example of a seedless vascular plant
Definition
fern
Term
plants that have tissues to deliver water and nutrients from one part of the plant to another
Definition
vascular plants
Term
vascular seed plant that does not flower
Definition
gymnosperm
Term
flowering plant with seeds inside a fruit
Definition
angiosperm
Term
List two groups of seedless plants
Definition
nonvascular plants and seedless vascular plants
Term
Nonvascular plants get the water they need
Definition
from the environment or nearby cells
Term
Rhizoids are like roots because
Definition
they help hold the plant in place.
Term
Rhizoids help nonvascular plants
Definition
obtain water and nutrients
Term
Is the following, true of liverworts; their gametophytes can be mosslike and leafy
Definition
yes it is true
Term
Ancient ____________ grew to 40m but are smaller today.
Definition
clubmosses
Term
An underground stem from which new leaves and roots grow is called
Definition
rhizome
Term
Describe the ferm gametophyte
Definition
a tiny plant about 1/2 the size of a fingernail, is green and flat, usually shaped like a tiny heart
Term
Young fronds are called _________ because of how they are coiled.
Definition
fiddleheads
Term
structure where silica is found in horsetails
Definition
stem
Term
substance that has a gritty texture
Definition
silica
Term
plants that have life cycles similar to horsetails
Definition
ferns
Term
used by pioneers to scrub pans
Definition
horsetails
Term
height of some modern horsetails
Definition
8m
Term
height of some modern club mosses
Definition
20cm
Term
plants that grow in woodlands
Definition
club mosses
Term
tissue found in club mosses but not in mosses
Definition
vascular tissue
Term
Name two kinds of seedless vascular plants that are popular houseplants
Definition
ferns and some club mosses
Term
Name two kinds of seedless vascular plants that can be eaten by humans.
Definition
young ferns and horsetail
Term
In what way are fossilized seedless vascular plants that died 3 million years ago important to humans?
Definition
provide coal
Term
nonvascular plants
Definition
have rhizoids; mosses and liverworts; usually the first plants to live in a new environment; must obtain water from the environment
Term
seedless vascular plants
Definition
provide many land animals with the food they need to survive; formed coal; ferns, horsetails and club mosses;contain xylem and phloem to transport water and food
Term
Vascular seed plants without flowers
Definition
ancestors grew very tall; conifers are an example; are the most abundant group of plants today; gymnosperms; contain xylem and phloem to transport water and food; seeds develop in a cone or in fleshy structures attached to branches
Term
vascular seed plants with flowers
Definition
angiosperms; seeds are surrounded by a fruit; are the most abundant group of plants today; contain xylem and phloem to transport water and food
Term
Vascular tissue that transports water and minerals through aplant is called
Definition
xylem
Term
Vascular tisssue that transports food molecules to all parts of a plant is called
Definition
phloem
Term
Most root systems are located
Definition
underground
Term
What are the three main functions of roots?
Definition
Roots supply water and dissolve minerals; hold plants securely in the soil; store food made during photosynthesis
Term
Cells of the epidermis that extend from the root
Definition
root hairs
Term
group of cells that produces a slimy substance
Definition
root cap
Term
root system with one main root
Definition
taproot - dicot and gymnosperms
Term
layer of cells that covers root surfaces
Definition
epidermis
Term
plants that usually have fibrous roots
Definition
monocots
Term
structure protected by the root cap
Definition
root tip
Term
what root hairs increase
Definition
surface area
Term
root system in which roots are usually the same size
Definition
fibrous root
Term
What does xylem do?
Definition
carries water and mineral from the roots to the leaves
Term
What does phloem do?
Definition
carries food to plant parts
Term
Stems that are soft, thin, and flexible are
Definition
Herbaceous
Term
Name two examples of plants with herbaceous stems.
Definition
wild flowers such as clover and poppies Crops, like beans, corn and tomatoes
Term
Wha is a growth ring?
Definition
a ring of dark cells (fall) surrounding a ging of light cells (spring)
Term
What is the main function of leaves?
Definition
they make food for the plant
Term
From top to bottom, list the four layers in a leaf.
Definition
Upper epidermis, Palisade layer, Spongy layer, Lower epidermis
Term
cells that open and close the stomata
Definition
guard cells
Term
layer of cells that contains many chloroplasts
Definition
palisade layer
Term
a single layer of cells beneath the cuticle
Definition
epidermis
Term
a tiny opening that allows carbon dioxide to enter the leaf
Definition
stoma
Term
layer where carbon dioxide moves freely and xylem and phloem are found
Definition
spongylayer
Term
structure that prevents water loss from the leaf
Definition
cuticle
Term
Cactus spines are _________ that protect cactuses from animals.
Definition
leaves
Term
The leaves of the sundew plant catch ________, which are digested to provide nitrogen to the plant.
Definition
insects
Term
Why do some plants have flowers?
Definition
adaptation for sexual reproduction, rely on aminals for pollination
Term
In a flower, modified leaves called _____ protect the bud.
Definition
sepals
Term
The broad, flat, thin leaflike parts of a flower, called ____, attract insects and other animals.
Definition
petals
Term
The male reproductive structure of flowers is a(n)
Definition
stamen
Term
In flowers, an(n) ___________ is the female reproductive structure.
Definition
pistil
Term
if the egg is fertillized, the ____ develops into a fruit and the __________ develops into a seed.
Definition
ovary, ovule
Term
Nonflowering seed plants
Definition
gymnosperms
Term
plants that have tissues to move water and nutrients to different parts of the plant
Definition
vascular
Term
plants that DO NOT have specialized tissues to move water and nutrients through the plant
Definition
nonvascular
Term
seed plants that have flowers
Definition
angiosperms
Term
tiny structures of the plant in which sperm are formed
Definition
pollen
Term
a waxy layer that coats most of the surfaces of a plant
Definition
cuticle
Term
a sticky fluid fromed by pine trees
Definition
resin
Term
small reproductive cells proteced by a thick cell wall
Definition
spores
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