Chapter 30: Plant Diversity II

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Seed

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Tags and Description

56 Terms

1

Seed

The embryo of a plant encased in a protective shell included with nutrients

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2

Homospory

One type of sporophyll that bears one type of spore

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3

Heterospory

A plant that produces two differing spores, one female one male, from separate organs

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4

Microsporangium/a

Male gametophyte, pollen

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5

Microspore

The reproductive product of microsporangia

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6

Megasporangium/a

Female gametophyte, archegonium

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7

Megaspore

The reproductive product of megasporangia

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8

Sporopollenin

Durable polymer that prevents zygotes from drying

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9

Ovule

Where the female gametophyte is held within the plant ovary

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10

Pollen grain

Structure that holds the male gametophyte, wall is made of sporopollenin

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11

Pollination

Transfer of pollen from one plant to another plant of the same species

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12

Germination

When pollen begins its growth into a pollen tube to discharge the sperm in to the female gametophyte

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13

Gymnosperm

Seed producing phylum of vascular plants, produce "naked" seeds, contain cone bearing plants

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14

Angiosperm

Phylum of seed producing plants, produce "containers" around their seeds, contain flowering plants

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15

Conifer

A cone bearing plant that is typically evergreen

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16

Microsporophyll

Make microspores (male)

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17

Megasporophyll

Make megaspores (female)

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18

Ovulate cone

More complex than pollen cone, bears megasporangia and accepts the pollen for germination

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19

Pollen cone

Simpler structure compared to ovulate cone, consist of scales, releases and produces pollen

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20

Phylum Cycadophyta

Phylum of Gymnosperms, have large cones and palm like leaves

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21

Phylum Ginkgophyta

Phylum of Gymnosperms, have flagellated sperm and deciduous leaves

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22

Phylum Gnetophyta

Phylum of Gymnosperms

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23

Magnoliids

Lower classification of Angiosperms, includes magnolia, laurels and black pepper

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24

Monocots

Lower classification of Angiosperms, includes orchids, grasses, and palms

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25

Phylum Coniferophyta

Phylum of Gymnosperms, largest phyla contains cone bearing plants

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26

Flower

Specialized shoot with up to 4 sets of modified leaves that bears sexual reproduction structures

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27

Sepals

Floral organ that helps to enclose and protect the flower bud before it opens; sterile

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28

Petals

Colorful part of flower that attracts pollinators, sterile

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29

Stamens

Pollen producing organ of flowering plants

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30

Filaments

Stalk portion of the stamen

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31

Anthers

Pollen holding part of the stamen

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32

Carpels

Ovule bearing organ of flowering plants

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33

Stigma

Sticky part of the carpal, captures pollen

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34

Style

Stalk of the carpal

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35

Ovary

Where egg containing ovules develop

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36

Pistil

Term referring to one carpel or multiple carpels fused together

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37

Fruit

mature ovary of a flowers, aids in protection and dispersal

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38

Pericarp

Part of the fruit formed from the wall of the ovary

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39

Embryo sac

Female gametophyte of angiosperms, contains 8 haploid nuclei

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40

Cross-pollination

Transfer of pollen from the anther of one flower to the stigma of another

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41

Micropyle

Pore in the integuments of an ovule

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42

Double fertilization

2 sperm cell unite with 2 cells in the female gametophyte to form zygote and endosperm

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43

Endosperm

Nutrient rich tissue that provides nourishment to embryo in angiosperm embryo

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44

Cotyledons

Embryonic leaf, first leaf of a plant

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45

Monocot

1 cotyledon

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46

Dicot

2 cotyledons

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47

Eudicot

Lower classification of Angiosperms, largest group, contain edible groups and ornamental flowers

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48

Basal angiosperms

Earliest flowering plants, water lilies

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49

Magnoliids

Lower classification of Angiosperms, includes magnolia, laurels and black pepper

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50

Eudicots

Lower classification of Angiosperms, largest group, contain edible groups and ornamental flowers

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51

What are the variations in seed dispersal

Wind, water, animal fur, and defication

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52

Gametophyte/sporophyte relationships across all plants?

Vascular plants are sporophyte dominated while nonvascular are gametophyte dominated

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53

What are some terrestrial adaptations that have allowed seed plants to generate diversity?

Contain a supply of nutrients, multicellular embryos, and a protective coating

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54

Why are these adaptations necessary for seed plants?

Supply of nutrients allows new plants to get a head start, multicellular embryos allow for a better start, and protective coating allows it to be dispersed without water

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55

Life cycle of a gymnosperm

Pollen leaves the pollen cone and enters the ovulate cone of another organism. The pollen forms a pollen tube and fertilizes the egg. The zygote forms a seed which is dispersed and grows into a sporophyte through mitosis. A new organism is grown and the gametes are produced through meiosis

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56

Life cycle of an angiosperm

A vehicle of pollination (pollinator, wind, etc.) gathers pollen off of the anther of one plant and transfers it to the stigma of another. There the sperm is released into the pistil of the plant (contains ovules). A seed is formed through mitosis and a new sporophyte plant grows form the seed. Gametes are produced through meiosis and the process is repeated

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