Seedless Vascular Plants

Flashcards based on key concepts from the lecture on seedless vascular plants.

The term for all land plants is __.

Embryophytes

Bryophytes are characterized by a free-living __.

gametophyte

The dominant generation in Bryophytes is the __.

gametophyte

The vascular tissue that provides support for stems and contains lignin is called __.

tracheary elements

There are three types of steles: protostele, siphonostele, and __.

eustele

Protostele is a solid cylinder of vascular tissue with __.

no pith

Siphonostele has a central __ surrounded by vascular tissue.

pith

Eustele consists of discrete strands around a __.

pith

Microphylls are associated with __ steles.

protostele

Megaphylls are typically found in plants with or steles.

siphonostele; eustele

Homosporous plants produce type of spore(s).

one

Heterosporous plants produce types of spores.

two

The evolutionary trend in gametophyte evolution is toward and gametophytes.

smaller; simpler

The four dominant groups of vascular plants in chronological order are: , , , and .

Rhyniophytes; Zosterophyllophytes; Trimerophytes; Angiosperms

Rhyniophytes, Zosterophyllophytes, and Trimerophytes evolved from the ancestral __.

green alga

The earliest known vascular plants are categorized under Phylum __.

Rhyniophyta

The dominant generation in the Phylum Rhyniophyta is the __.

sporophyte

Phylum Lycopodiophyta is characterized by having __ leaves.

microphylls

Phylum Monilophyta includes ferns and their allies such as and .

whisk ferns; horsetails

Club mosses belong to the family __.

Lycopodiaceae

Spike mosses belong to the family __.

Selaginellaceae

The resurrection plant is scientifically known as __.

Selaginella lepidophylla

The gametophyte generation in heterosporous plants is __ in size.

reduced

True ferns have leaves that are classified as __.

megaphylls

The clusters of sporangia on ferns are called __.

sori

The tiny, heart-shaped gametophyte in ferns is called a __.

prothallus

In homosporous plants, the spore develops into a __ gametophyte.

bisexual

In heterosporous plants, the microspore develops into a __ gametophyte.

male

Microspores are produced in __, while megaspores are produced in __.

microsporangia; megasporangia

The first vascular plants were likely small and __ with terminal sporangia.

simple

The function of lignin in vascular plants is to provide __.

support

The evolution of roots and leaves contributed to the increase in plant __.

size

Tracheids are an evolutionary advancement found in the __ of vascular plants.

xylem