Plant Life Cycles Flashcards
Haploidiplonic Life Cycle - Haploid Stage
meiosis creates spores –> spore –> gametophyte –> mitosis creates egg and sperm
Haploidiplonic Life Cycle - Diploid Stage
fertilization creates zygote –> embryo –> sporophyte –> sporangia –> spore mother cell
In the Haploidiplonic Life Cycle, fertilization creates..
a zygote
In the Haploidiplonic Life Cycle, meiosis creates..
spores
In the Haploidiplonic Life Cycle, mitosis creates…
egg and sperm
What stages are haploid? (Seedless Non-vascular plants/Bryophytes)
mitosis; meiosis transitions to haploid stage
What stages are diploid? (Seedless Non-vascular plants/Bryophytes)
mitosis; fertilization transitions from haploid to diploid
Where does meiosis occur? (Seedless Non-vascular Plants/Bryophytes)
from sporangium, creates spores
Where does fertilization occur? (Seedless Non-vascular Plants/Bryophytes)
females make eggs in archegonia and males make sperm in antheridia (zygote develops in archegonium)
Defining Characteristics of Life Cycle (Seedless Non-vascular Plants/Bryophytes)
sporophyte is temporary and grows out of female gametophyte; male gametophyte is dominant (diploid stage)
What stages are haploid? (Seedless Vascular Plants)
meiosis, mitosis
What stages are diploid? (Seedless Vascular Plants)
mitosis
Where does meiosis occur? (Seedless Vascular Plants)
mature sporangium
Where does fertilization occur? (Seedless Vascular Plants)
archegonium
Defining Characteristics of Life Cycle (Seedless Vascular Plants)
gametophyte prominent (independent of sporophyte); sporophyte dominant in diploid stage; antheridium and archegonium both on gametophyte
Where does meiosis occur? (Gymnosperms)
megaspore mother cell
Where does fertilization occur? (Gymnosperms)
pollen tube in megaspore
Defining Characteristics of Life Cycle (Gymnosperms)
fertilization occurs 15 months after pollination
What stages are haploid? (Angiosperms)
mitosis
What stages are diploid? (Angiosperms)
mitosis, germination
Where does meiosis occur? (Angiosperms)
ovule
Which group undergoes double fertilization?
angiosperms
In which plant group would you expect to find naked spores and vascular tissues?
ferns
In which plant group would you expect to find triple fertilization?
angiosperms
