Introduction Flashcards
(50 cards)
Harvested after being dug up from the ground
Peat/Sphagnum moss
Found due to peat harvest
Tollund Man
Where is the Tollund Man found today?
Silkeborg museum, Denmark
Why was the Tollund Man preserved?
Acidic and anoxic conditions underground contributed to by the Sphagnum moss
Divided plants into two groups
August Wilhelm Eichler
Two groups provided by Eichler
Cryptogamae and Phanerogamae
Cryptogamae
Fungi, algae, ferns, bryophytes
Reproduce via spores
Phanerogamae
Usual plants
Reproduce via seeds
Current plant classification (3 groups)
Non-vascular plants, vascular cryptogams, spermatophytes
Non-vascular plants include
Bryophytes
Vascular cryptogams include ____________ which have ____________, but do not produce ___________.
Pteridophytes, vascular tissues, seeds
Spermatophytes include (2 groups)
Gymnosperms, angiosperms
Green plants
Chlorobionta
Apomorphies of green plants:
- Cellulose
- Chlorophyll a and b present in chloroplasts
- Thylakoids in stacks (grana)
- True starch used as storage
Two sister groups that make up chlorobionta
Chlorophytes, streptophytes
Major apomorphy of streptophytes
Oogamy (gametes differentiated into eggs and sperm)
Differentiate the haplontic forms of reproduction:
Isogamy - undifferentiated gametes, same sizes
Oogamy - differentiated gametes, larger egg and motile sperm
Charales
Exhibits oogamy
Charophytes
More advanced group
Major apomorphy of charophytes
Presence of plasmodesmata (found at the primary wall and serves as connection for symplast transport)
Land plants
Embryophyta
Land plants are defined by the presence of:
- Embryo
- Cuticle
- Parenchyma
Embryophytes were first colonized during what period?
Silurian period (400 mya)
Haplodiplontic life cycle is also known as
Alternation of generations