Angiosperm Reproduction and Biotechnology Flashcards
Angiosperm alternating generations
dominant sporophyte stage and reduced gametophyte stage
4 reproductive structures of a flower
carpels, stamens, petals, and sepals
Sepals
modified leaves that protect flower buds
Petals
attract pollinators
Stamens
male reproductive structure that produces male gametophytes
Carpels
female reproductive structure that harbors female gametophytes and receive male ones
Eudicots
develop two cotyledons
Monocots
develop one cotyledon
Cotyledon
embryonic leaf
Epicotyl
embryonic shoot
Radicle
embryonic root
How do seeds enter dormancy?
they dehydrate as they reach maturity
Germination process
initiation by water absorption
1. seed coat breaks down and radicle emerges
2. epicotyl emerges from soil and cotyledons photosynthesize
3. epicotyl develops true leaves
Apomixis
ovules develop into complete seeds without fertilization
Monoecious angiosperm
a perfect flower containing both carpel (female) and stamen (male)