T13 - Evolution of Land Plants Flashcards
1
Q
Along with plants,
What other protist groups have multicellular, photosynthetic properties?
A
algae
2
Q
Along with plants,
What other protist groups have cell walls made of cellulose?
A
- red, green, brown algae
- few dinoflagellates
3
Q
Along with plants,
What other protist groups have photosynthetic sugards in plastids
A
- green algae and land plants
4
Q
Along with plants,
What other protist groups have life cycles with alternation of generations
A
- brown algae
5
Q
What are the three common traits between charophyte green algae and land plants?
A
- rings of cellulose-synthesizing proteins in the plasma membrane
- similar flagellated sperm
- phragmoplast formation during mitosis
6
Q
What are the benefits and challenges of moving onto land?
A
benefits:
- decreased competition
- increased photosynthesis
- more CO2
- mineral-rich soil
- few predators and pathogens
challenges
- rare water
- lack of structural and upright growth support
7
Q
adaptations to the coonization of land
A
- sporopolenin
- water conservation (waxy cuticle, stomata)
- lignified vascular trissue for transport, rigitdity, and height
- functional compartmentalization
8
Q
Characteristics of land plants
A
- clade archaeplastidia
- alternation of generations
- multicellular, dependent embryos
- walled spores
- multicellular gametangia
- apical meristems
