18 Questions
What is the main purpose of a seed in flowering plants?
To insure the continuation and distribution of the plant
What type of ovule has uniform growth and has the micropyle at the extreme end opposite to the funicle?
Atropous
In which type of ovule is the micropyle near the funicle and the raphe runs along one side of the ovule?
Anatropous
What is the term for the structure that connects the ovule to the plant?
Funicle
In which type of ovule is the body of the ovule bent about 90o upon the funicle?
Amphitropous
What type of ovule has no raphe and has the chalaza, funicle, and micropyle all closed?
Campylatropous
What is the characteristic feature of Albuminous seeds?
The reserved materials are stored in the tissue surrounding the embryo.
What is the term for the fleshy membranous covering arising from the hilum and almost completely covering the seed?
Aril
What is the characteristic feature of Exalbuminous seeds?
The kernel consists of the embryo alone which is well developed and stores reserve material in it.
What is the term for the covering like an aril, but arising from the micropylar end?
Arillode
What is the term for the extension of the testa in the form of a membranous fold?
Wing
What is the characteristic feature of seeds that have a well-developed endosperm and a small embryo?
Albuminous seeds with a well-developed endosperm and a small embryo.
What is the characteristic of the nucellus in this type of seed?
It is curved
Which part of the seed is developed from the primary endospermal nucleus of the embryo sac?
Endosperm
What is the function of the micropyle in the seed?
It allows water uptake during germination
What is the term for the scar left by the removal of the stalk or funiculus from the seed?
Hilum
In which type of seeds is the raphe seen?
Anatropous and amphitropous seeds
What is the term for the kernel of the seed?
All the tissues enclosed within the testa
This quiz covers the different types of seeds, including albuminous and exalbuminous seeds, and their structure. It also explains the role of endosperm, perisperm, and embryo in seed development.
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