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Seed Types and Structure

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Questions and Answers

What is the main purpose of a seed in flowering plants?

To insure the continuation and distribution of the plant (correct)

To protect the plant from pathogens

To store nutrients for the growing plant

To regulate water uptake

What type of ovule has uniform growth and has the micropyle at the extreme end opposite to the funicle?

Amphitropous

Anatropous

Atropous (correct)

Campylatropous

In which type of ovule is the micropyle near the funicle and the raphe runs along one side of the ovule?

Anatropous (correct)

Campylatropous

Amphitropous

Atropous

What is the term for the structure that connects the ovule to the plant?

Funicle Signup and view all the answers

In which type of ovule is the body of the ovule bent about 90o upon the funicle?

Amphitropous Signup and view all the answers

What type of ovule has no raphe and has the chalaza, funicle, and micropyle all closed?

Campylatropous Signup and view all the answers

What is the characteristic feature of Albuminous seeds?

The reserved materials are stored in the tissue surrounding the embryo. Signup and view all the answers

What is the term for the fleshy membranous covering arising from the hilum and almost completely covering the seed?

Aril Signup and view all the answers

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. Signup and view all the answers

What is the term for the covering like an aril, but arising from the micropylar end?

Arillode Signup and view all the answers

What is the term for the extension of the testa in the form of a membranous fold?

Wing Signup and view all the answers

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. Signup and view all the answers

What is the characteristic of the nucellus in this type of seed?

It is curved Signup and view all the answers

Which part of the seed is developed from the primary endospermal nucleus of the embryo sac?

Endosperm Signup and view all the answers

What is the function of the micropyle in the seed?

It allows water uptake during germination Signup and view all the answers

What is the term for the scar left by the removal of the stalk or funiculus from the seed?

Hilum Signup and view all the answers

In which type of seeds is the raphe seen?

Anatropous and amphitropous seeds Signup and view all the answers

What is the term for the kernel of the seed?

All the tissues enclosed within the testa Signup and view all the answers