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Questions and Answers
What is the purpose of arrested development in the formation of seeds?
What is the purpose of arrested development in the formation of seeds?
Arrested development is essential for the development of seeds.
Where do male gametophytes develop and in what state are they dispersed?
Where do male gametophytes develop and in what state are they dispersed?
Male gametophytes develop inside the sporophyte plant and are dispersed in a dormant state.
What are the characteristics of an embryo in a seed?
What are the characteristics of an embryo in a seed?
The embryo in a seed has a root/shoot axis, apical meristems, and cotyledons.
How does the metabolic rate of the embryo change during seed development?
How does the metabolic rate of the embryo change during seed development?
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How are nutrients supplied to seeds?
How are nutrients supplied to seeds?
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Study Notes
Development and Provisioning of Seeds
- Seeds are formed through the process of arrested development, which is essential for their development.
- Male gametophytes develop inside the sporophyte plant and are dispersed in a dormant state until they reach a female gametophyte for fertilization.
- After fertilization, the zygote quickly develops into an embryo with root/shoot axis, apical meristems, and cotyledons.
- The development of the embryo in seeds ceases, with no cell division or differentiation, but metabolic rate drops and tolerance to extreme conditions increases.
- Seeds are provisioned with nutrients that supply energy for cellular respiration and materials for plant cell construction.
- Materials can be stored in the female gametophyte, the embryo's cotyledons, or the endosperm tissue found in angiosperms.
- Nutrients in seeds are supplied by the parent plant via phloem tissue, which is connected to each seed through vascular traces.
- Seeds are packaged with an embryo and stored food inside a seed coat, which develops from the integuments of the parent plant's sporophyte tissues.
- The development of a seed involves the development of the zygote into an embryo, the transformation of the ovule's sporophyte tissues into a seed coat, and the development of nutritive tissue.
- The nutritive tissue in seeds proliferates and expands to supply materials to the seed after dispersal.
- The development of seeds is crucial for the survival and growth of plants, as it allows them to produce structures that can obtain matter and energy on their own.
- The specific provisioning and packaging of seeds vary between different plant species.
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Description
Test your knowledge on the development and provisioning of seeds with this quiz. Learn about the process of seed formation, the role of nutrients and storage, and the importance of seed development for plant survival. Discover how different plant species vary in their seed provisioning and packaging.
