Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Which of the following is not a step in the germination of a monocot seed?

a. Enzymes secreted into the endosperm digest the endospermcell walls and macromolecules.

b. The embryo imbibes water and then produces gibberellin.

c. The embryo absorbs nutrients released from the endosperm.

d. Endosperm develops as a food reserve.

e. Gibberellin acts on the cells of the aleurone and scutellum toencode hydrolytic enzymes.

Summary Introduction


Seed germination can be described as the growth of plant embryo present within the seed. This embryo is usually surrounded by endosperm and seed coat. Seed germination keeps the life cycle going for the plants. The germination of seeds follows a specific series of events.


Justification/explanation for the correct answer:

Option (d) is that endosperm develops as a food reserve. During the process of seed germination, the embryo requires the food already present with the endosperm for developing and growing. This results in the breakdown of the walls of endosperm cell and utilization of the nutrients present by the embryo. The endosperm develops as a food source during fertilization and is utilized for the nutrients present during germination. Hence, option (d) is correct.

Explanation for the incorrect answers:

Option (a) is that enzymes secreted into the endosperm digest the endosperm cell walls and macromolecules. This is one of the major events in seed germination that helps the embryo to utilize the energy required to develop into a new plant...

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