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Name Five major characteristics of the Fungi Kingdom:
Bell Ringer Section 22-1 Review of Unit Three Name Five major characteristics of the Fungi Kingdom: Eukaryotes- Cells have a nucleus 2. Have a cell wall made of chitin 3. Mostly Multicellular (except for yeast which is unicellular 4. Heterotrophs- AKA Consumers. Fungi are decomposers 5. Some reproduce sexually and some reproduce asexually How is this different than the Plant Kingdom? Go to Section:
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Introduction to Plants
What is a plant? A. Multicellular – composed of more than 1 cell B. Eukaryotic – cells contain a nucleus C. Autotrophic – most carry out photosynthesis D. Cell walls made of cellulose Reproduce sexually and asexually In Sexual Reproduction– plants create egg and sperm cells Asexual reproduction - can reproduce by propagation (fragmentation) – cuttings taken from plant and allowed to root - identical to parent
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Generalized Plant Life Cycle
Section 22-1 Haploid Diploid MEIOSIS Spores (haploid) Gametophyte Plant (haploid) Sporophyte Plant (diploid) Sperm (haploid) Eggs (haploid) FERTILIZATION Go to Section:
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II. Why are plants important?
A. Base of land food chains B. Provide shade and shelter for animals C. Produce oxygen D. Important sources of medications
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III. What do plants need in order to survive?
A. Sunlight B. Water and Minerals C. Gas Exchange – take in CO2 and release O2 D. Movement of water and minerals
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IV. How did today’s plants evolve?
A. Probably from organisms similar to today’s multicellular freshwater algae B. Evidence for this: plants and algae share- 1. Similar life cycles (alternation of generations) 2. Cellulose in cell walls 3. Similar pigments; like chlorophyll 4. DNA evidence
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V. What are the four major groups of plants that exist today?
A. Bryophytes (nonvascular, seedless – Ex: mosses) B. Ferns (vascular, seedless – Ex. Ferns) C. Gymnosperms (vascular, cone-bearing plants – Ex: pine tree) D. Angiosperms (vascular, flowering plants – Ex: dogwood tree, rose)
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Bryophytes
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Vascular Tissue: The food and water transport systems
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Ferns
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Seeds
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Gymnosperms
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Flowers used to help reproduction
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Angiosperms
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Figure 22-7 The Diversity of Plants
Section 22-1 Cone-bearing plants 760 species Flowering plants 235,000 species Ferns and their relatives 11,000 species Mosses and their relatives 15,600 species Go to Section:
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Why are plants classified into these groups? 2 main reasons.
A. Based on 3 important physical features Whether or not they have vascular tissue A. Vascular Tissue: conducts water and minerals 2. Whether or not they produce seeds or spores 3. Whether or not they produce flowers B. Project Deep Green 1. Since 1994, Biologists from 12 nations have been classifying plants by comparing DNA sequences
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Evolution of the Phone
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Figure 22–6 A Cladogram of Plant Groups
Section 22-1 Flowering plants Cone-bearing plants Ferns and their relatives Mosses and their relatives Green algae ancestor Flowers; Seeds Enclosed in Fruit Seeds Water-Conducting (Vascular) Tissue Go to Section:
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Name 3 characteristics of the plant kingdom.
Scientist believe all plants probably evolved from this common ancestor. What evidence supports this? What group of plants is the most primitive? What group of plants is the most successful?
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Bryophytes and Ferns I. What are the characteristics of Bryophytes?
A. Seedless- reproduce using spores not seeds B. Non-vascular – do not have xylem and phloem - Rely on osmosis and diffusion to move water and nutrients / must live in wet habitats! C. Grow just a few centimeters off the ground D. Depend on water for reproduction – sperm swims to egg
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III. How do bryophytes reproduce?
Fertilization occurs when sperm swims thru water to egg – gametophyte forms Gametophyte is dominant Sporophyte is dependent upon the gametophyte
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II. What are the 3 major groups of bryophytes?
Mosses Liverworts Hornworts
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Moss
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Liverwort
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Hornwort
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Bryophyte: Stomata (pores)
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The Structure of a Moss Sporophyte Stem Gametophyte Leaf Rhizoid
Section 22-2 Capsule Stalk Sporophyte Gametophyte Stem Leaf Rhizoid Go to Section:
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Bryophyte: Pseudo Leaves
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Bryophyte Anatomy Rhizoids, haploid
Gametophyte (main plant body, “leaves”), haploid Rhizoids, haploid
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Bryophyte Anatomy Gametophyte makes gametes (sperm and eggs), haploid
Sperm have tails to swim in the moisture on the plant to another nearby plant in order to fertilize the egg.
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Bryophyte Anatomy Fertilized eggs (diploid) grow into a sporophyte
The sporophyte (diploid) grows up from the top of the gametophyte (haploid)
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The sporophyte (diploid) is made up of a stalk and capsule…
Bryophyte Anatomy The sporophyte (diploid) is made up of a stalk and capsule… The sporophyte (diploid) goes through meiosis and released spores (haploid) from the capsule.
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Moss: Sporophyte growing from gametophyte
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Moss covers almost every available surface in rainforests
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Eggs for sperm to fertilize
Bryophyte Anatomy Sperm Sperm being released Eggs for sperm to fertilize
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Gametophyte (body with “leaves”) Gametophyte (Haploid)
Bryophyte Anatomy Capsule Sporophyte (Diploid) Stalk (Seta) Gametophyte (body with “leaves”) Gametophyte (Haploid) Rhizoid
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IV. What are mosses used for?
Dried sphagnum mosses used in gardening and potted plants
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Moss is used in gardening and planting because it is extremely absorbent
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IV. What are mosses used for?
Dried sphagnum mosses used in gardening and potted plants Peat – accumulated moss used as fuel
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Peat (accumulated dead moss) is cut from the ground and used as fuel in many European countries
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Bog
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Bodies of the Bogs Bodies of the Bog
Prevents decomposition of dead organisms
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The Structure of a Moss Sporophyte Stem Gametophyte Leaf Rhizoid
Section 22-2 Capsule Stalk Sporophyte Gametophyte Stem Leaf Rhizoid Go to Section:
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Figure 22–6 A Cladogram of Plant Groups
Section 22-1 Flowering plants Cone-bearing plants Ferns and their relatives Mosses and their relatives Green algae ancestor Flowers; Seeds Enclosed in Fruit Seeds Water-Conducting (Vascular) Tissue Go to Section:
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Ferns: Seedless Vascular Plants
IV. What are the characteristics of ferns and their relatives? A. Seedless- reproduce using spores B. True vascular tissue – have xylem and phloem C. Can grow tall because of lignin and vascular tissue D. Depend on water for reproduction – sperm swims to egg
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VII. How do seedless vascular plants reproduce?
Fertilization occurs when sperm swims thru water to egg Sporophyte is dominant Sporophyte develops from the gametophyte
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VI. What are the major groups of seedless vascular plants?
Ferns Club mosses Horsetails
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Tree fern – native to East Indies
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Boston Fern
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Club moss (“miniature pines”)
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Horsetails – also called scouring rushes
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The Life Cycle of a Fern Section 22-3 Go to Section: MEIOSIS
Sporangium (2N) Haploid gametophyte (N) Diploid sporophyte (2N) Frond Young gametophyte (N) Spores (N) Mature sporophyte (2N) Developing sporophyte (2N) Mature gametophyte (N) male Sperm Gametophyte (N) Egg embryo (2N) female FERTILIZATION Go to Section:
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Alternation of Generations: Ferns
Sporophyte = dominant (most conspicuous) individual Gametophyte = small, fragile structure most people (even botanists!) never notice
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Fern Gametophytes
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Alternation of Generations: Ferns
Frond = diploid sporophyte Sorus = collection of sporangia where meiosis occurs
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Sori on a Fern Sporophyll
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Pinna Sori
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Figure 22–6 A Cladogram of Plant Groups
Section 22-1 Flowering plants Cone-bearing plants Ferns and their relatives Mosses and their relatives Green algae ancestor Flowers; Seeds Enclosed in Fruit Seeds Water-Conducting (Vascular) Tissue Go to Section:
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Seed Plants Gymnosperms and Angiosperms
Gymnosperms – do not produce flowers or fruits but do produce seeds and have vascular tissue. Largest group of gymnosperms are the conifers. Ex; pine trees Conifers have 2 types of cones; male and female Male cones produce pollen that carries sperm cells Female cones produce eggs
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Seed Plants Gymnosperms and Angiosperms
Gymnosperms – do not produce flowers or fruits but do produce seeds. Largest group of gymnosperms are the conifers. Ex; pine trees Conifers have 2 types of cones; male and female Male cones produce pollen that carries sperm cells Female cones produce eggs Pollination occurs by the wind: not dependent on water After pollination, the fertilized egg develops into a seed.
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Seed Cones (female) and Pollen Cones (male)
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Figure 22–19 The Structure of a Seed
Section 22-4 Seed coat Embryo Stored food supply Seed Wing B A Go to Section:
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Welwitschia It only grows in a remote region of southwestern Africa in the Namib and Mossamedes Deserts. The leaves lie on the ground and as they flap about in the wind they become split and frayed. Welwitschias absorb moisture in the form of dense fog that flows over the Namib Desert.
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Cycads
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B. Conifers are an important source for building materials and paper products
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II. Angiosperms – produce flowers, fruits, and seeds and are the most abundant plants on Earth.
A. Two main types of angiosperms: Monocots and Dicots
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Figure 22–25 Comparison of Monocots and Dicots
Section 22-5 Monocots Dicots 1 seed leaf Parallel veins Floral parts in multiples of 3 Vascular bundles scattered Fibrous roots Two Branched veins Floral parts in multiples of 4 or 5 Vascular bundles in a ring Taproot Seeds Leaves Flowers Stems Roots Go to Section:
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B. Pollination occurs mostly by animals (best adaptation!)
Many angiosperms have mutual relationships with animals like insects, bats, or birds. As animals gather nectar from flowers, they also transfer pollen from flower to flower. Many species are flower specific- only gather nectar from one type of flower. After pollination and fertilization, seeds develop inside protective fruits.
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C. Angiosperms are the main source of food for all animals on earth including humans. Rice, wheat, barley, grasses – all are angiosperms. They are also used in medicines, clothing and other products.
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Figure 24–5 The Structure of a Flower
Section 24-1 Filament Anther Stigma Style Ovary Carpel Petal Sepal Ovule Stamen I. Carpel – female a. Stigma – traps pollem b. Style supports stigma; forms a pollen tube c. Ovary – becomes fruit d. Ovule- becomes seeds II. Stamen – male a. Anther- produces pollen b. Filament- supports anther III. Petals – attract pollinators IV. Sepals – protect flower bud while it is developing
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From flower to fruit Flowers, fruits and seeds…
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III. Why are seed plants more successful that spore producing plants?
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A. Gametophyte generation is very tiny (only a few cells)
A. Gametophyte generation is very tiny (only a few cells). In gymnosperms and angiosperms it is protected inside seeds and fruits so the young of seed plants tend to survive better. The spores of ferns and mosses must land in a wet habitat. If they do not, they will die. B. Sperm does not have to swim thru water- it is carried by wind or animals during pollination. This enables seed plants to live in dryer habitats. It also increases reproductive success.
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Figure 24–1 Evolution of the Gametophyte and the Sporophyte
Section 24-1 Gametophyte (N) Sporophyte (2N) Bryophytes Ferns Seed plants
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Basic Structures in Plants
Seed – embryo of a plant that is protected by a covering and surrounded by a food supply Can remain dormant for many years Environmental factors (temperature and moisture) end dormancy
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3. Many modified for easy dispersal
a. Light weight - can float in water and in the air b. Textured seed coats that stick to animal fur c.“Winged” seeds – can “fly” long distances away from parent plant d. Angiosperm seeds are surrounded by fleshy fruits that are eaten by animals allowing seeds to be dispersed e. Seeds of Gymnosperms develop inside of protective cones
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Figure 22–19 The Structure of a Seed
Section 22-4 Seed coat Embryo Stored food supply Seed Wing B A Go to Section:
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B. Vascular Tissues- system of “tubes” throughout a plant; two types – xylem and phloem
Xylem - transports water from the roots to the rest of the plant Phloem - transports the products of photosynthesis (sugars) from the leaves to the rest of the plant
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C. Roots – absorb water and nutrients, anchor the plant, store food
D. Stems – supports plant, contains vascular tissue to transport water and nutrients between the roots and leaves
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Figure 23–7 The Structure of a Root
Section 23-2 Pg. 585 Epidermis Root hairs Phloem Xylem Apical meristem Root cap Zone of maturation Zone of elongation Ground tissue (cortex) Vascular Cylinder
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Figure 23–1 Root, Stem, and Leaf Tissues
Section 23-1 Leaf Stem Root Dermal tissue Vascular tissue Ground tissue
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Two types of growth occur in stems and roots
Primary – growth from the tips of the roots and the shoots at areas called apical meristem Secondary – growth in the width of the plant. (tree rings)
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Figure 23–15 Layers of a Tree Trunk
Section 23-3 Wood Bark Cork Contains old, nonfunctioning xylem that helps support the tree Contains active xylem that transports water and minerals Produces new xylem and phloem, which increase the width of the stem Transports sugars produced by photosynthesis Produces protective layer of cork Contains old, nonfunctioning phloem that protects the tree Xylem: Heartwood Cork Cambium Phloem Vascular Cambium Xylem: Sapwood
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E. Leaves carry out photosynthesis and transpiration
Epidermis - outer layer that covers the leaf. “skin” Cuticle – waxy covering over the epidermis that prevents the plant from drying out Mesophyll - middle layer of cells that carry out photosynthesis and exchange of the gases CO2 and O2 Stomata – openings on the bottom of the leaf that allow gases to enter and leave Guard cells – cells around the stomata that open and close the stomata
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When the guard cells are full of water, the stomata is open
When the guard cells are full of water, the stomata is open. When they do not have water the stomata is closed. (This helps the plant conserve water when it is dry. Stomata are usually closed at night. (no sun = no photosynthesis)
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Figure 23–18 The Internal Structure of a Leaf
Section 23-4 Cuticle Veins Epidermis mesophyll Xylem Vein Phloem mesophyll Epidermis Stomata Guard cells
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Transpiration A B Evaporation of water molecules out of leaves.
Section 23-5 A B Evaporation of water molecules out of leaves. Pull of water molecules upward from the roots.
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Figure 24–5 The Structure of a Flower
Section 24-1 I. Carpel – female a. Stigma – traps pollen b. Style supports stigma; forms a pollen tube for sperm to reach egg c. Ovary – becomes fruit d. Ovule- eggs that becomes seeds II. Stamen – male a. Anther- produces pollen b. Filament- supports anther c. pollen – carries sperm III. Petals – attract pollinators IV. Sepals – protect flower bud while it is developing Filament Anther Stigma Style Ovary Carpel Petal Sepal Ovule Stamen
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23-4 Structure and Function of Leaves
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Figure 22–6 A Cladogram of Plant Groups
Section 22-1 Flowering plants Cone-bearing plants Ferns and their relatives Mosses and their relatives Green algae ancestor Flowers; Seeds Enclosed in Fruit Seeds Water-Conducting (Vascular) Tissue Go to Section:
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Figure 22–6 A Cladogram of Plant Groups
Section 22-1 Flowering plants Cone-bearing plants Ferns and their relatives Mosses and their relatives ????????? Flowers; Seeds Enclosed in Fruit Seeds Water-Conducting (Vascular) Tissue What organism do scientist believe all plants evolved from? Green Algae Go to Section:
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Figure 22–6 A Cladogram of Plant Groups
Section 22-1 Flowering plants Cone-bearing plants ???? Mosses and their relatives Green algae ancestor Flowers; Seeds Enclosed in Fruit Seeds Water-Conducting (Vascular) Tissue Fern and their relatives First group of plants to evolve vascular tissue? Go to Section:
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Figure 22–6 A Cladogram of Plant Groups
Section 22-1 Flowering plants ?????????? Ferns and their relatives Mosses and their relatives Green algae ancestor Flowers; Seeds Enclosed in Fruit Seeds Water-Conducting (Vascular) Tissue Gymnosperms What group of plants were the first to evolve seeds? Go to Section:
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Flowering plants Cone-bearing plants Ferns and their relatives Mosses and their relatives Green algae ancestor Flowers; Seeds Enclosed in Fruit Seeds Water-Conducting (Vascular) Tissue The Seed ???????????? What characteristic evolved at this point to bring fourth cone-bearing plants?
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Conifers are found in which of the four groups of plants?
Gymnosperms
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This plant belongs in what group of plants?
Bryophyte
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Fill in the Blank In bryophytes….. Fertilization occurs when ______________ swims thru water to egg – gametophyte forms Sperm
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How does pollination usually occur in angiosperms?
Animals
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What group of plants does this organism belong?
Angiosperms
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Name the two parts of a plant’s life cycle
Gametophyte stage and Sporophyte stage
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How does pollination occur usually in gymnosperms?
By Wind
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Group of plants that is Seedless but has vascular tissues
Ferns
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Group of Plants that Have Vascular Tissue and Seeds enclosed in a fruit
Angiosperms
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How will this seed be dispersed?
Wind
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Dicot b/c of the branched veins in the leaf
Monocot or Dicot? Dicot b/c of the branched veins in the leaf
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Part of the flower that attracts pollinators
Petals
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The part of the flower that protects the immature flower as a bud
Sepals
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Stamen Male reproductive part of the flower The stamen is made up of two parts
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Carpel or Pistil The female parts of the flower make up the ____________
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Carpel or Pistil Stigma
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Style
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Ovule
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Anther
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What becomes the fruit of a flower after fertilization?
The Ovary
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Waxy covering of a leaf that prevents the leaf from drying out
Cuticle
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Scientist believe that all plants probably evolved from a common ancestor to today’s _____________________ Green Algae
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A c B d E F
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