Seedless Vascular Plants

which gen is dominant in seedless vascular

sporophyte

Which stage is used more for dispersal in seedless vascular plants, spores or gametes?

spores

• sperm still require water to swim to egg

Xylem

• transport water and minerals

• roots → shoots

• cells are dead at maturity

• provides structural support

Phloem

• transports sugars/organic nutrients

• can move roots to shoots or vice versa

• cells living at maturity

• primarily transports food

What is lignin, and why is it important?

strengthening polymer in cell walls

• allows plants to grow upright/tall

• structural support

What is the difference between primary and secondary growth?

Primary = length

• secondary = width

  • make s

Secondary growth tissues

• secondary xylem (wood)

• secondary secondary phloem

• Vascular cambium and cork cambium (lateral meristems).

heterospory

produces 2 different kinds of spores

• microspores- male gametophytes

• megaspores- female gametophytes

homospory

produces one type of spore

• turns into bisexual gametophyte (producing both sperm and eggs)

Which type of “spory” do the lycophytes, monilophytes and lignophytes exhibit?

• lyco and ligno hetero

• moni homo

Microspores

• develop into male gametophytes

• produce sperm

Megaspores

• develop into female gametophytes

• produce eggs

What do we call the 4 spores produced by meiosis in vascular plants?

tetrad