Biology Lab Test 2

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Sporophyte

A multicellular diploid (2n) generation

Gametophyte

A multicellular haploid (n) generation

Nonvascular plant phyla:

Mosses - Bryophyta

Liverworts - Hepatophyta

Hornworts - Anthocerophyta

Vascular seedless plant phyla:

Club mosses - Lycophyta

Ferns, horsetails, and whisk ferns - Monilophyta

Vascular naked seed plant (gymnosperm) phyla:

Conifers - Coniferophyta

Cycads - Cydadophyta

Ginkos - Ginkophyta

Gnetophytes - Gnetophyta

Vascular seed plants with fruits and flower (angiosperm) are phylum:

Anthophyta

Non-vascular and some vascular seedless plant cycle

Meiosis produces spores within a sporangium located on the mature sporophyte plant. Spores germinate and develop into gametophytes. The gametophytes produce gametes in organs called archegonia (egg) and antheridia (sperm). Sperm and egg unite to form a zygote via fertilization. This develops into a mature sporophyte plant.

Polytrichum

Moss specimen. The brown and green is the haploid gametophyte. The antenna-things are diploid sporophyte.

Mnium

Mature moss specimen. The spores are ALWAYS haploid

Archegonia

Part of the moss life cycle. This is a mature gametophyte and comes from the female gametophyte, making it haploid.

Antheridia

Part of the moss life cycle. This is a mature gametophyte and comes from the male gametophyte, making it haploid.

Moss life cycle

Heterosporous. Water required for sperm to transport egg.

Marchantia

A type of liverwort. The macroscopic view looks like a bunch of boogers with brown noodles. The spores are haploid and the sporophyte is diploid.

Anthoceros

A type of hornwort. The haploid spores are stores inside the diploid capsules.