lesson 1 Flashcards
challenges to terrestrial life
desiccation: removal of moisture from something
transport
desiccation
cuticle
stomata
transport
trachieds
xylem
phloem
bryophytes
-non-tracheophytes
-gametophyte
-require water for sexual reproduction
non-tracheophytes
no tracheids
gametophyte
dominant
photosynthetic
tracheophytes
-vascular tissues
-waxy cuticle
-stomata
sporophyte dominant
-3 clades
vascular tissues
xylem (trachieds)
phloem
3 clades
-lycophytes
-pterophytes
-seed plants
lycophytes
-vascular tissue (roots and stems)
-no seeds
-water required for fertilization
-sporophyte dominant
pterophytes: ferns and relatives
-sporophyte dominant
-water for fertilization
-no seeds
-vascular tissue (roots stems, true leaves(euphylls))
seed plants
-gymnosperms
-angiosperms
-evolutionary advantages
*seeds protect embryo
*food supply
*dispersal
*dormancy
pollen
*multicellular male gametophyte
*sperm
*transport by wind or pollinator
gymnosperm
“naked seed”
angiosperms
“seeed in a vessel”
fruits
flowers
*pollen with 2 sperm
*double fertilization
-2n zygote
-3n endosperm
