Moss Cycle (Plants)

Question 1

sexual reproduction

Answer 1

when snow melts in spring

need water so sperm can swim to egg in separate plant

Question 2

gametophyte generation

Answer 2

haploid plants

Question 3

antherdium

Answer 3

male gametangia
found on tips of main axis or side branches
located on short stalks
rounded shape
produce sperm
release sperm when they absorb so much H2O they burst
sperm swim in the H2O to plants with eggs

Question 4

archegonium

Answer 4

female gametangia
release sugary fluid when neck opens after absorbing H2O that attracts sperm
sperm swims down neck of archegonium to find an egg
embryo develops in archegonium

Question 5

embryo

Answer 5

forms mature sporophyte

Question 6

sporophyte

Answer 6

diploid
3 parts:
1. foot- connects sporophyte to gametophyte
2. stalk/seta- holds capsule up
3. capsule- spore case that produces thousands of haploid spores

Question 7

calyptra

Answer 7

sometimes found on outside of capsule
remains of archegonium
helps to identify moss species

Question 8

capsule

Answer 8

lower section holds spores
cap- operculum connected to case by annulus (ring of cells)
H2O leaves annulus cells in dry weather which causes them to shrink and operculum breaks off
spores held in case with teeth that open up in dry weather

Question 9

spores

Answer 9

spread in air
germinate and grow in favourable conditions
grow into haploid plants- gametophyte generation