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Concept explainers
To describe: How contribution of seeds and other adaptations led to rise of seed plants and made them dominant in plant communities.
Introduction:
Seed plants, also known as spermatophytes, consist of those plants that produce seeds. The presence of seeds and other adaptations has played a pivotal role in helping them to survive in various conditions and making them a dominant form of plant. The major features of the seed plants include seeds and pollen grains. The seeds aid in protecting the embryo in extreme environments, while the pollen grains provide mobility to the sperm. It enables the movement of sperm from one plant to a new plant, thus helping in pollination and formation of a seed. The means of dispersion of pollens can be either by the help of wind or by an animal. Hence, it can travel to longer distances and to various places to help in pollination. Thus, seeds and other adaptations have contributed to the rise of seed plants, and their dominance in plant communities.
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Chapter 30 Solutions
Campbell Biology (11th Edition)
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- SCI500B_Organisms_FRQ_GA (3).docx Word Design Layout References Mailings Review View Help Tell me what you want to do 2. In a common eudicot pattern of development for the common bean in the figure, the radicle emerges from the seed (1), then begins to develop into a primary root that grows down into the soil. As this occurs, the hypocotyl emerges from the seed and bends into the shape of a hook (2). The bent hypocotyl lengthens and pulls the cotyledons upward (3). When the hypocotyl reaches the soil surface, exposure to light causes it to straighten (4). Primary leaves emerge from between the cotyledons and begin photosynthesis. The cotyledons typically undergo a period of photosynthesis before shriveling (5). Eventually, the cotyledons fall off the lengthening stem, and the young plant's new leaves produce all of its food. (1 (a) Identify and explain what environmental factors influence the timing and coordination of the germination of seeds. (b) Predict what would happen if the…arrow_forwardModified Rootsarrow_forwardDo as as soon as possible Remain time 20 min left.arrow_forward
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