Seedless Vascular Plants Flashcards
What are Tracheophytes?
Vascular plants.
What are the characteristics of a tracheophyte?
They have true vascular tissue, Lignin. Stems and roots.
What are the sporophytes of tracheophytes like?
They are independent, branched, vascular, and photosynthetic.
What are the gametophytes of tracheophytes like? Are they vascular?
Reduced role. They do not have vascular tissue.
What are Cooksonia?
The oldest vascular plants.
What kind of branching do Cooksonia have? Where are there sporangia?
Dichotomous. They have terminal sporangia.
What are Rhynia? What kind of branching do they have?
Plant that lived about over 400 million years ago. They have dichotomous branching.
What do Rynia have that Cooksonia do not?
Rhizomes and rhizoids.
What are the spores in Rynia like?
They are in tetrads.
What are Aglaophyton major? What characteristics do they have that are similar to Rynia?
Plant that lived about over 400 million years ago. They have rhizomes and spores in tetrads and dichotomous branching.
What do Aglaphyton major have that the other two old plants do not?
Specialized water-conducting tissues, but not true trachids.
How are Aglaphyton major similar to Cooksonia?
They have dichotomous branching, terminal sporangia, stomata, and a cuticle.
How are Aglaphyton major dissimilar to Cooksonia?
They have horizontal rhizomes, rhizoids, and not true roots or tracheids.
What organisms are within the group, Seedless, Vascular plants?
Lychophytes and Pteridophytes.
What organisms are within the group, Lychophytes?
Club mosses, spike mosses, quillworts.
What organisms are within the group, Pteridophytes?
Ferns, whisk ferns, horsetails.
What kind of leaves do Lychophytes have?
Microphylls.
What are the characteristics of Microphytes?
Solid, vascular strand. No leaf gap. Usually small.
What are the characteristics of Megaphytes?
Have a leaf gap.
Do Lychophytes have megaphylls or microphylls?
Microphylls.
Do lychophytes have true roots, stems, and leaves?
Yes.
What is endosproric development?
The gametophytes remain within spore wall.
Is Lycopodium homosporous or heterosporous?
Homosporous.
Is Selaginella homosporous or heterosporous?
Heterosporous.
What group is Selaginella in?
Lychophytes.
Does Selaginella have endosporic development?
Yes.
What kind of leaves do Selaginella have?
Microphylls.
What is a Lepidodendron?
A tree-sized club moss. Part of the Carboniferous forest.
What kind of leaves do ferns have?
Megaphylls.
Can fern gametophytes live independently?
Yes.
Do Psilotophytes have leaves or roots?
No.
What do Psilotophytes have that do photosynthesis?
Stems.
What kind of branching do Psilotophytes have?
Dichotomous.
Are Psilotophytes homosporous or heterosporous?
Homosporous.
