Lecture 5: The Invasion of the Land Flashcards
(12 cards)
1
Q
what are embryophytes?
A
plants in which the zygote is not free living and the embryo is protected within the tissues of the parent
2
Q
what are bryophytes?
A
a grouping of the primitive non-vascular land plants
3
Q
what are tracheophytes?
A
vascular plants
4
Q
what are features of bryophytes?
A
- leafy
- no roots
- homosporus
- sporophyte lives as parasite on gametophyte
5
Q
what are the evolutionary innovations of charophytes?
A
- phragmoplast
- plasmodesmata
- multiple chloroplast per cell
- encapsulation of the egg
- apical growth
- branching gametophyte
6
Q
what are the evolutionary innovations of the bryophyta?
A
- encapsulated, diploid embryos
- multicellular sporophyte and sporangia
- gametangia
- cuticle
- stomata
7
Q
what are features of liverworts?
A
- leafy, thallose forms
- possess internal air-spaces and pores that enable gas exchange
- evolved a thin waxy cuticle that limits water loss
- sporophyte has defined growth
8
Q
what are features of mosses?
A
- 1 cell thick leaves without cuticles
- no vascular tissue
- sporophyte has determinate growth
- has no chlorophyll but has stomata
- can withstand lack of moisture
- successful in humid or waterlogged environments (epiphytes)
- male and female gametangia
9
Q
A
10
Q
A
11
Q
A
12
Q
A
