Chapter 10 - Plants Flashcards
What does a seed consist of?
seed coat, embryo, storage material (usually food)
What is the seed coat?
hard outer layer that covers and protects the seed from various external forces
What is the purpose of storage material in a seed?
Provides nutrients to the embryo
Nutrients are stores in seeds in the form of _____
endosperm
The embryo consists of _ parts:
4: radicle, hypocotyl, plumule, epicotyl
The ____ is the part of the embryo that develops into the young root
Radicle
Which parts of the embryo make up the young shoot?
hypocotyl, plumule, epicotyl
The hypocotyl is the:
bottom region of the young shoot
The epicotyl develops into the:
very top region of the young shoot (shoot tip)
What is the plumule?
Develops into the young leaves in the plant embryo
What is germination?
Sprouting of a seedling after a period of dormancy
When does a seed break dormancy?
When environmental conditions become suitable for growth (water, temperature, light)
What is the most important environmental cue that starts germination?
water
Imbibition
absorption of water by the seed
Imbibition causes:
seed swells and breaks the seed coat, activates certain enzymes to produce energy for growth process