bio notes 2/13 real
Card Set Information
bio notes 2/13 real
what are the 4 clades of seedless vascular plants?
club moss, horsetail, whisk ferns, ferns
club moss have?
microphylls (simple scale-like leaves)
what do horsetail, whisk ferns and ferns have?
what does horsetail have that is impregnated with silica?
reduced megaphylls that form whorls
what is another name for horstails?
which clade has reduced or no megaphyll?
what has megaphylls with branching vascular strands; emerge as fiddleheads (rabbit fern)
describe the sporangia found in leptosporangiate ferns?
found in clusters, thin walls 1 cell thick, protected by indusium
applications of seedless vascular plants?
club mosses were used as "flash powder" in photography in the 1800s.
characteristics of seed plants?
sperm doesnt swim to egg, has vascular tissue, secondary growth, gametophytes are greatly reduced, all are heterosporous, have seeds
two types of vascular tissue?
what does xylem contain?
tracheids and sometimes vessel elements
which xylem has vessel elements?
what is a growth that contributes to a growth in diameter?
what causes secondary growth?
accumulation of xylem (wood)
what are some advantages of secondary growth?
provides support to grow taller, facilitates light absorption and seed dispersal,
what plant is always woody?
what develops while attached to sporophyte and is nutritionally dependent on it?
what are the 2 types of spores developed by meiosis (sporophyte 2n)
what develops into tiny microgametophyte (pollen
grain) which produces 2 sperm by mitosis.?
what is a male gametophyte that is dispersed by wind or animal?
develops into microscopic megagametophyte which
produces 1 egg by mitosis which is retained in megagametophyte
what is the fusion of sperm and egg?
what are the 3 generations that seeds contain tissues from?
seed coat, nutritive tissue, embryo
what is developed from the integument of a parent sporophyte?
what is developed from the female gametophyte?
what is the new sporophyte?
what are the advantages of seeds?
protection, dispersal, nourishment, extended period of dormancy,
what do embryos of seedless plants develop into?
sporophytes that often die due to unstable conditions