Endospermic And Non-Endospermic Seeds Flashcards
Over time what does the cotyledon do?
It continues to grow and absorb the endosperm
What is the definition of a non-endospermic seed?
A non-endospermic seed has no endosperm when full formed
What is the definition of an endospermic seed?
An endospermic seed contains some endosperm when fully formed
What is the seed said to be if all the endosperm is absorbed by the cotyledon?
Non-endospermic
Give some examples of non-endospermic seeds.
3
Broad bean
Peanut
Sunflower
What is the seed said to be if the cotyledon only absorbs some of the endosperm?
Endospermic
Give two examples of endospermic seeds.
Maize
Corn
Where does the energy needed for the growth of a seed come from?
It comes from the nucellus and from food that enters the seed from the parent plant
What is provided by the nucellus?
Energy needed for the growth of a seed
Where is the nucellus located during seed formation?
It is absorbed by the endosperm and then by the cotyledon or cotyledons
What is lost when a seed is fully formed?
When a seed is fully formed it loses most of its water
When a seed is fully formed it loses most of its water, what affect does this have?
This slows down the development of the embryo and allows dormancy to begin
When does dormancy begin?
After the seed is fully formed and has lost most of its water
What begins when a seed has fully formed and lost most of its water?
Dormancy
