Lecture 13/14 Flashcards
which phyla forms the basal taxon of the Archaeplastida supergroup?
red algae
what makes red algae differ from green algae and land plants?
they don’t contain chlorophyll b
they retained the reddish pigments that are present in cyanobacteria, an were lost in green algae
differences between chlorophytes and charophytes
chlorophytes are mostly unicellular and charophytes are multicellular
chlorophytes not connected via plasmodesmata
chlorophytes grow in sheets while charophytes grow in one direction
what do all plants have?
spores
what kind of lifecycle do plants have?
haplodiplontic
how many multicellular stages does a plant go though?
two, one haploid (gametophyte) one diploid (sporophyte)
(alternation of generations)
what doesn’t charophytes have?
alternation of generation
what plant doesn’t have a cuticle or stomata?
liverworts
is the gametophyte or sporophyte dominant in bryophytes?
gametophyte
is the gametophyte or sporophyte dominant in seedless vascular plants?
sporophyte
what makes spike moss unique?
it is heterosporous
what does heterosporous mean?
it produces microspores (male) and megaspores (female)
are spike mosses closely related to seed plants?
no
benefits of seeds
protected by seed coat
can remain dormant
includes nutrients
aids in dispersal
benefits of spores
protects sperm
eliminates dependance on water for fertilization
aids in dispersal
how are conifers adapted to cold and dry environments?
narrow leaves
thick cuticle
narrow conical shape
retention of leaves all year round
anti free compounds
