Plant Life Cycles
Meiosis Review Cell starts diploid –E–Ex: Human = 46 chromosomes Cell divides twice to create 4 cells End result: Haploid cells –E–Ex: Human = 23 chromosomes Cells created: Sperm, egg, pollen
Alternation of generations (In general) Diploid zygote created Diploid zygote grows into a diploid sporophyte Haploid spores created by meiosis Haploid spores grow into haploid gametophytes –M–Male gametophyte creates haploid sperm –F–Female gametophyte creates haploid egg Sperm and egg fuse to make a diploid zygote Cycle restarts
Moss Life Cycle
gametophyte 1)Moss gametophytes grow near the ground (haploid stage) 2) Through water, sperm from the male gametophyte will swim to the female gametophyte to create a diploid zygote 3) Diploid sporophyte will grow from zygote 4) Sporophyte will create and release haploid spores..... sporophyte egg male female zyg ote
5) Haploid spores land and grow into new gametophytes..... groundgametophyte 6) The process repeats
..... sporophyte egg male female zyg ote
5) Haploid spores land and grow into new gametophytes..... groundgametophyte 6) The process repeats
Fern Life Cycle
Adult Sporophyte (diploid).... 1) Sporophyte creates and releases haploid spores ground
.... 2) Haploid spores land in the soil
ground 3) From the haploid spores, gametophyte grows in the soil Let’s zoom in
4) Sperm swim through water from the male parts (antheridium) to the female parts (archegonia) Let’s zoom back out egg zyg ote
ground 5) Diploid sporophyte grows from the zygote sporophyte
6) Fronds uncurls into leaves. ground 7) Cycle repeats -- Haploid spores created and released....
Adult Sporophyte (diploid).... 1) Sporophyte creates and releases haploid spores ground
.... 2) Haploid spores land in the soil
ground 3) From the haploid spores, gametophyte grows in the soil Let’s zoom in
4) Sperm swim through water from the male parts (antheridium) to the female parts (archegonia) Let’s zoom back out egg zyg ote
ground 5) Diploid sporophyte grows from the zygote sporophyte
6) Fronds uncurls into leaves. ground 7) Cycle repeats -- Haploid spores created and released....
Conifer Life Cycle
1) Male and female seed cones grow in adult sporophytes
2) Pollen grains released from the male seed cones -- Pollen is the male gametophyte egg zyg ote egg zyg ote Male cones make pollen Female cones make eggs
3) Seeds begin to harden inside the female cones seed
4) Seeds released
5) Seed will land ground
6) Seedling grows into (sporophyte)…the cycle repeats ground
1) Male and female seed cones grow in adult sporophytes
egg zyg ote egg zyg ote Male cones make pollen Female cones make eggs
3) Seeds begin to harden inside the female cones seed
4) Seeds released
5) Seed will land ground
6) Seedling grows into (sporophyte)…the cycle repeats ground
Angiosperm Life Cycle
Pollen stick to animal or released into wind
Animal finds a new flower to feed on
Pollen transferred to the stigma….seeds develop egg zyg ote
Fruit ripens to help disperse seeds zyg ote
Fruit falls to ground
Animals eat fruit….seeds come out the other end…cycle repeats seed
Pollen stick to animal or released into wind
Animal finds a new flower to feed on
Pollen transferred to the stigma….seeds develop egg zyg ote
Fruit ripens to help disperse seeds zyg ote
Fruit falls to ground
Animals eat fruit….seeds come out the other end…cycle repeats seed
End of the Semester!