1 Flashcards
1
Q
2n phase bryophyte
A
- Starts with fertilization
- Fertilization produces zygote
- Zygote develops into Sporophyte (mitosis)
- Meiosis takes place in the Sporangia of the sporophyte
- Spores are released and haploid phase starts
2
Q
1n
phase bryophyte
A
- Starts with Meiosis in sporangia producing spores
- Spores develop into gametophyte through mitosis
- Gametophyte produces archegonia or antheridia or both
- Antheridia produces sperm
- Archegonia produces eggs
- Fertilization happens and then 2n phase
3
Q
Seed what
A
mature, fertilized ovary
4
Q
Parts of seed (3)
A
embryo
testa(seed coat): protect embryo
food source: nourish embryo
5
Q
Why do seeded plants have advantage over free sporing plants
A
Free sporing plants’ embryos are at the mercy of their environment
6
Q
Alternation of Generations
A
- The alternation of multicellular diploid and haploid forms in organisms life cycle
7
Q
Gametophyte
A
- The haploid (n) gamete producing phase in life cycle
8
Q
where are gametes formed
A
- Gametes formed in either antheridia (sperm) or in archegonia (egg)
9
Q
which phase bryophyte dominate?
A
- Gametophyte dominant
10
Q
which phase seedless vascular plant dominate?
A
- Sporophyte dominant
- Gametophyte is free living however
11
Q
which phase angiosperm and gymnosperm plant dominate?
A
- Sporophyte dominant
Gametophyte greatly reduced(few cells)
12
Q
How does sperm reach the egg in Bryophytes
A
Fertilization happens when the sperm swims to the egg
13
Q
Homospory
A
1 type of spore
14
Q
Heterospory
A
- 2 types of spores
- Mega and micro spores
- Like homospory, except Sporophyte has female and male sporangium, producing microspores and megaspores through meiosis
- Megaspores and microspores develop into mega and microgametophyte (pollen)
