Biol: Bryophytes And Seedless Vascular Plants

Front 1

Stoma (ata)

Back 1

One of the minute pores in the epidermis of a leaf or stem through which gases and water vapor pass.

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Vascular Tissue

Back 2

specialized cells for the transport of material.

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Thallus

Back 3

the plant body

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gametophyte

Back 4

In organisms undergoing alternation of generations, the multicellular haploid form that mitotically produces haploid gametes that unite and grow into the sporophyte generation.

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Sporophyte

Back 5

In organisms undergoing alternation of generations, the multicellular diploid form that results from a union of gametes and that meiotically produces haploid spores that grow into the gametophyte generation.

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gametangium (a)

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multicellular plant structures in which gametes are formed. Female gametangia are archegonia and male gametangia are called antheridia.

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Mnium

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mosses similar to those of genus Bryum but larger, unisex

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antheridium (a)

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In plants, the male gametangium, a moist chamber in which gametes develop.

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archegonium

Back 9

in plants, the female gametangium, a moist chamber in which gametes develop.

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embryo

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new developing individual.

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sporangium

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A capsule in fungi and plants in which meiosis occurs and haploid spores develop.

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Zygote

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The diploid product of the union of haploid gametes in conception; a fertilized egg.

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gametes

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A haploid cell, such as an egg or sperm. Gametes unite during sexual reproduction to produce a diploid zygote.

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spores

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in the life cycle of a plant or alga undergoing alternation of generations, a meiotically produced haploid cell that divides mitotically, generating a multicellular individual, the gametophyte, without fusing with another cell.

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alteration of generations

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a life cycle in which there is both a multicellular diploid form, the sporophyte, and a multicellular haploid form, the gametophyte; characteristic of plants and some algae.

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Rhizoid

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long tublular single cell or filament of cells that anchors bryophytes to the ground. They are not composed of tissues,lack specialized conducting cells, and do not play a primary role in water and mineral absorption.